ASTM D5118 certified

ASTM D5118 Certified

ASTM D4727 certified

ASTM D4727 Certified

CSA Class Code A certified

CSA Class Code A Certified

6x6x30 Kraft Corrugated Shipping Boxes

6x6x30 Kraft Corrugated Shipping Boxes are single-wall corrugated cardboard boxes designed for shipping and storing long, narrow items. Ideal for rods, tubes, posters, and elongated merchandise, they offer reliable protection during transit with standard kraft construction and precise inside dimensions for accurate fitment.

Long Corrugated Boxes
Telescoping Boxes
Shipping Boxes
Stock Boxes
V3C Boxes ASTM D5118
Multi-Depth Corrugated Boxes
Sheets & Pads
Printers Boxes - Corrugated Cardboard Boxes
File Storage Boxes
Military Boxes
Flat Corrugated Boxes
Hazardous Material Boxes
Moving Boxes

Our Range of Products

Long Corrugated Boxes

Long Corrugated Boxes

  • 63+ long box sizes, up to 48" length
  • Per-unit pricing starting as low as $0.91
  • Corrugated build protects narrow items in transit
Telescoping Boxes

Telescoping Boxes

  • Adjustable 2-piece design fits irregular shapes
  • Heavy-duty 200#/ECT-32 kraft corrugated material
  • F.O.L. bottom adds structural integrity
Shipping Boxes

Shipping Boxes

  • 1,000+ stock sizes; custom orders in 7-10 days
  • Single, double & triple wall options available
  • ASTM D5118 compliant for regulated shipping
Stock Boxes

Stock Boxes

  • Custom sizes engineered to exact dimensions
  • Low MOQ starting at just 100 pieces
  • Full-color print options for branded packaging
V3C Boxes ASTM D5118

V3C Boxes ASTM D5118

  • Pre-printed fragile handling & destination labels
  • Flap tabs speed up packing efficiency
  • Specialty boxes for wardrobes, mirrors & bikes
Multi-Depth Corrugated Boxes

Multi-Depth Corrugated Boxes

  • One box serves multiple height requirements
  • 80 size options from 4x4x4" to 36x36x36"
  • Resize with a utility knife, no special tools

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Frequently Asked Questions

What is the difference between a kraft box and a corrugated box?

A kraft box refers to the material — unbleached kraft paper that gives boxes their characteristic brown color. A corrugated box refers to the construction — a fluted inner layer sandwiched between two flat liners for structural strength. A 6x6x30 kraft corrugated shipping box is both: made from kraft paper and built with corrugated construction for durability during transit.

How much does a 6x6x6 cardboard box weigh?

Where can I buy custom size shipping boxes?

What are 6x6x30 kraft corrugated boxes used for?

What wall construction is recommended for a 6x6x30 shipping box?

Are these boxes sold in bulk quantities?

Do these boxes meet carrier packaging requirements for UPS and FedEx?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

E-Commerce & Retail

E-Commerce & Retail

Right-sized 6x6x30 boxes minimize dimensional weight charges and protect elongated products during fulfillment shipping.

Industrial & Manufacturing

Industrial & Manufacturing

Ideal for shipping rods, pipes, and elongated industrial components securely in corrugated kraft boxes.

Sporting Goods & Recreation

Sporting Goods & Recreation

Protects fishing rods, golf clubs, and sporting equipment during retail shipping and e-commerce delivery.

Government & Military

Government & Military

ASTM D5118-compliant corrugated boxes meet military and government specification packaging requirements for specialized shipments.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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Why E-Commerce & Industrial Shippers Choose Cardboard Boxes 4 U

1,300+ Corrugated Box Sizes

Access over 1,300 stock corrugated box sizes including long, narrow, and specialty configurations for every shipping requirement.

Government-Grade Compliance

Products meet ASTM D5118, ASTM D4727, WRA, and MPA standards, ensuring carrier-compliant and specification-ready packaging solutions.

Custom Boxes in 7–10 Days

Custom-sized corrugated boxes engineered to exact dimensions are manufactured and turned around in as few as 7 to 10 business days.

Get the Right Shipping Box for Your Needs

Submit your inquiry and our packaging specialists will respond with sizing guidance, pricing, and bulk order options tailored to your needs.

Contact Us Today

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