Skip to main content Skip to footer
Stock your workplace for cold & flu
Get $20 off your first order of $100
Save 5% with Rewards+
Fanatical customer service since 1956
Coupons & Rewards Hot Deals Buy Again
Rep photo Get expert
support now
Track an order
Shared cart
Reward not redeemed
You dont have enough points to redeem this reward.
Shopping list
Alternative Items
18 x 18 x 18 Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
$227.99 Save 1%
$223.49
Per bundle
($44.70/EACH)
Add to cart
Earn +223 points
Description
Specifications
Accessories
Reviews
  1. Home
  3. Shipping, Packing & Mailing Supplies
  5. Shipping Supplies
  7. Corrugated Boxes & Pads
  9. Shipping Boxes
  11. Corrugated Boxes; 18" Length

18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)

Order 18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW) today at Quill.com and get fast shipping. Stack coupons to get free gifts & extra discounts!
Item #: 550-1499968BOX
Model #: HD181818TW
Brand: SI Products
Not yet rated. Be the first to Write a review!
18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
18 x 18 x 18 Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
Earn +223 points
$227.99 Save 1%
$223.49
Per bundle
$44.70/EACH
Rewards+ members price
$216.591 BUNDLE = 5 EACH
Enroll Now
1 BUNDLE = 5 EACH
Free trial details
Want an extra discount today, and every day? Start your free trial.
18" x 18" x 18" Heavy Duty Shipping Boxes, 90 ECT, 5/Bundle (HD181818TW)
Add to cart
Oversized item fee
Ship to: 60069
Submit
Delivery:Wed, Nov 5 - Thu, Nov 6
Free returns
Add to list
Length in Inches:
18
Width in Inches:
18
Height in Inches:
18
Pack Qty:
5
Request bulk pricing

Customers also viewed

Quill Brand 6 x 6 x 4 Multi-Depth Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (MD664)Quill Brand 6 x 6 x 4 Multi-Depth Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (MD664)
Quill Brand 6" x 6" x 4" Multi-Depth Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (MD664)
Item #: 901-MD664Q
$34.69
Per pack
($1.39/EACH)
Add
Earn 34 points
Quill Brand 12 x 12 x 2 Corrugated Shipping Boxes, 200#/ECT-32-B Mullen Rated, 50/Carton (MFL12122)Quill Brand 12 x 12 x 2 Corrugated Shipping Boxes, 200#/ECT-32-B Mullen Rated, 50/Carton (MFL12122)
Quill Brand 12" x 12" x 2" Corrugated Shipping Boxes, 200#/ECT-32-B Mullen Rated, 50/Carton (MFL12122)
Item #: 901-MFL12122
$146.49
Per carton
($2.93/EACH)
Add
Earn 146 points
48 x 8 x 8 Shipping Boxes, 32 ECT, Brown, 20/Bundle (4888)
48" x 8" x 8" Shipping Boxes, 32 ECT, Brown, 20/Bundle (4888)
Item #: 901-426455Q
$95.09
Per bundle
($4.75/EACH)
Add
Earn 95 points
20 x 16 x 10 Shipping Boxes, 32 ECT, Brown, 25/Pack (BS201610)
20" x 16" x 10" Shipping Boxes, 32 ECT, Brown, 25/Pack (BS201610)
Item #: 901-24407830
$117.19
Per pack
Add
Earn 117 points
5 x 7 Staples Chipboard Pad, 1125/Case (CP57)5 x 7 Staples Chipboard Pad, 1125/Case (CP57)
5" x 7" Staples Chipboard Pad, 1125/Case (CP57)
Item #: 901-948674BOX
(2)
$66.99
Per carton
($0.06/EACH)
Add
Earn 66 points
8.5 x 11 Chipboard Pad, Kraft, 750/Carton (BSCPHD8511)
8.5" x 11" Chipboard Pad, Kraft, 750/Carton (BSCPHD8511)
Item #: 901-948237BOX
(2)
$161.99
1-9 carton
($0.22/EACH)
Save 7%
$149.99
10+ carton
($0.20/EACH)
Add
Earn 161 points
Quill Brand® 20 x 16 x 12 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (201612)Quill Brand® 20 x 16 x 12 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (201612)
Quill Brand® 20" x 16" x 12" Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (201612)
Item #: 901-201612Q
$129.19
1-19 bundle
($5.17/EACH)
Save 8%
$117.99
20+ bundle
($4.72/EACH)
Add
Earn 129 points
Quill Brand 22 x 12 x 10 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 20, (221210)Quill Brand 22 x 12 x 10 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 20, (221210)
Quill Brand 22" x 12" x 10" Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 20, (221210)
Item #: 901-221210
$92.29
Per bundle
Add
Earn 92 points
12(L) x 24(W) x 12(H) Open Top Bin Boxes, White, 50/Bundle (BSBINJ122412)
12(L) x 24(W) x 12(H)" Open Top Bin Boxes, White, 50/Bundle (BSBINJ122412)
Item #: 901-2647503
$125.29
Per bundle
Add
Earn 125 points
6.5 x 6.5 x 48 Shipping Boxes, Brown, 25/ Bundle, Box 2 of 2 (T6648OUTER)
6.5" x 6.5" x 48" Shipping Boxes, Brown, 25/ Bundle, Box 2 of 2 (T6648OUTER)
Item #: 901-T6648OUTER
$80.99
1-2 bundle
($3.24/EACH)
$80.99
$73.99
5+ bundle
($2.96/EACH)
Add
Earn 80 points
StayFlat Mailers, 9 x 11-1/2, White, 100/Case (ENVRM2PSWSS)
StayFlat Mailers, 9" x 11-1/2", White, 100/Case (ENVRM2PSWSS)
Item #: 901-424862Q
$68.99
Per carton
($0.69/EACH)
Add
Earn 68 points
StayFlat White Mailers, 9 x 11-1/2, 100/Case
StayFlat White Mailers, 9" x 11-1/2", 100/Case
Item #: 901-424850Q
(3)
$74.99
Per carton
($0.75/EACH)
Add
Earn 74 points
Quill Brand 4 x 4 x 40 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (4440)Quill Brand 4 x 4 x 40 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (4440)
Quill Brand 4" x 4" x 40" Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (4440)
Item #: 901-4440
$71.69
1-9 bundle
Save 7%
$65.99
10+ bundle
Add
Earn 71 points
Quill Brand 10 x 8 x 6 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (1086)Quill Brand 10 x 8 x 6 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (1086)
Quill Brand 10" x 8" x 6" Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (1086)
Item #: 901-426557Q
$45.49
Per bundle
($1.82/EACH)
Add
Earn 45 points
6 x 6 x 48 Shipping Boxes, Brown, 25/Bundle, Box 1 of 2 (T6648INNER)
6" x 6" x 48" Shipping Boxes, Brown, 25/Bundle, Box 1 of 2 (T6648INNER)
Item #: 901-T6648INNER
$104.19
Per bundle
($4.17/EACH)
Add
Earn 104 points
24 x 18 x 24 Shipping Boxes, 32 ECT, Brown, 10/Bundle (241824)
24" x 18" x 24" Shipping Boxes, 32 ECT, Brown, 10/Bundle (241824)
Item #: 901-241824
(2)
$145.99
Per carton
($14.60/EACH)
Add
Earn 145 points
StayFlat Kraft Mailers, 9 x 11-1/2, 100/Case
StayFlat Kraft Mailers, 9" x 11-1/2", 100/Case
Item #: 901-424832Q
$109.69
Per carton
Add
Earn 109 points
StayFlat White Mailers, 11 x 13-1/2, 100/Case
StayFlat White Mailers, 11" x 13-1/2", 100/Case
Item #: 901-424852Q
(1)
$78.99
Per carton
($0.79/EACH)
Add
Earn 78 points
Quill Brand 13 x 13 x 6 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (13136)Quill Brand 13 x 13 x 6 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (13136)
Quill Brand 13" x 13" x 6" Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (13136)
Item #: 901-13136Q
$72.69
1-2 carton
($2.91/EACH)
Save 10%
$64.99
5+ carton
($2.60/EACH)
Add
Earn 72 points
Quill Brand 15 x 15 x 8 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (15158)Quill Brand 15 x 15 x 8 Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (15158)
Quill Brand 15" x 15" x 8" Corrugated Shipping Boxes, 200#/ECT-32 Mullen Rated Corrugated, Pack of 25, (15158)
Item #: 901-15158Q
$97.69
1-9 carton
($3.91/EACH)
Save 7%
$89.99
10+ carton
($3.60/EACH)
Add
Earn 97 points
Description
Specifications
Accessories
Reviews
Designed for maximum strength and protection, these heavy-duty shipping boxes are ideal for transporting heavy or fragile items. Made with robust triple-wall 90 ECT corrugated material, they offer exceptional durability and resistance to crushing, making them perfect for demanding shipping environments. Whether used in industrial, commercial, or warehouse settings, these boxes ensure your contents stay safe and secure throughout transit.
  • Triple-wall 90 ECT construction for maximum strength and durability
  • Designed to handle heavy, bulky, or fragile items with confidence
  • Provides superior protection against crushing, punctures, and impact
  • Ideal for industrial, commercial, and warehouse shipping needs
  • Easy to assemble and stack for efficient packing and storage
Bale Quantity
30
Box Shape
Square
Box Style
RSC (Regular Slotted Container)
Box Type
Standard
Brand
SI Products
Corrugate Height (Inches)
16-19"
Corrugate Length (Inches)
16-19"
Corrugate Rating
90 ECT
Corrugate Wall
Triple Wall
Corrugate Width (Inches)
16-19"
Heavy Duty
Yes
Height in Inches
18
Length in Inches
18
Material of Item
Corrugated
Pack Qty
5
True Color
Kraft
Width in Inches
18
Scotch Heavy Duty Packing Tape with Dispenser, 1.88 x 22.2 yds., Clear (142)Scotch Heavy Duty Packing Tape with Dispenser, 1.88 x 22.2 yds., Clear (142)
Scotch Heavy Duty Packing Tape with Dispenser, 1.88" x 22.2 yds., Clear (142)
Item #: 901-142Q
(2192)
$6.09
Per each
Add
Earn 6 points
Scotch Box Lock 1.88 Packing Tape Dispenser, Clear, 6/Pack (1956)Scotch Box Lock 1.88 Packing Tape Dispenser, Clear, 6/Pack (1956)
Scotch Box Lock 1.88" Packing Tape Dispenser, Clear, 6/Pack (1956)
Item #: 901-24461303
(12)
$33.69
Per pack
($5.62/EACH)
Add
Earn 33 points
Scotch Cushion Lock Protective Wrap, Tan, 12 x 30 (PCW-1230)Scotch Cushion Lock Protective Wrap, Tan, 12 x 30 (PCW-1230)
Scotch Cushion Lock Protective Wrap, Tan, 12" x 30' (PCW-1230)
Item #: 901-24503159
(15)
$7.29
Per each
Add
Earn 7 points
Quill Brand® 5/16 Bubble Roll, 12x30, Each (27176-US/CC)
Quill Brand® 5/16" Bubble Roll, 12"x30', Each (27176-US/CC)
Item #: 901-835124STP
(630)
$12.99
Per each
Add
Earn 12 points

Helping your business win

Get supplies, get rewards

Earn one point for every dollar spent, with so many ways to use them.

Your order has arrived

Fast, free shipping on orders $25 or more. Returns are easy, too.

Savings on savings on savings

Stack promotions, coupons, & rewards, stretching your dollars.

We love phone calls

Our award-winning customer service is here to help anytime.
Just call 1-800-982-34001-800-982-3400

How'd we do?

Share your experience on

Quill help center

Call us 1-800-982-3400

New to Quill? Would you like to learn more about how we can help your business?

Start a chat.
Email us.
Looking for coupons?
You will be redirected to travel.quill.com in a new tab. Hit Okay to continue.
Okay
Go to Cart
Subtotal: ( items / rewards):
Rewards balance:
Rewards & coupons center
Loading your cart
Quick view
Shared Cart Details
Please review this product
Upgrade to Rewards+
$49.99/year
Member benefits
$39.99 Quill 10-Ream Copy Paper
Up to 4 cartons per order, limit 8 cartons per month
10% in QUILLCASH Rewards on ink & toner
View policy
$15 off monthly coupon (with 100 points)
Always free shipping
View policy
Earn 10% more points + more time to use
5% off everday prices
10% off discount on in-house brands
Member exclusive rewards
Site-wide price match guarantee
View policy
Disclaimer
Offers and discounts exclude HP,Samsung and Epson. We offer a worry-free enrollment guarantee - if you are not satisfied with your Rewards+ membership, you can cancel at any time for a prorated refund. By enrolling into the Reward+ program, you are agreeing to the Terms and Conditions.
See full membership details