Supply Air 4x4x18 Corrugated Cardboard Shipping Boxes – Tall Mailer Boxes for Packing, Moving & Storage (Multiple Pack Sizes)

Highlights

• DIMENSIONS: Each box measures 4 inches length x 4 inches width x 18 inches height exterior when assembled, with interior usable dimensions of approximately 3.75 x 3.75 x 17.5 inches after accounting for corrugated wall thickness
• MATERIAL: Single-wall corrugated cardboard construction with brown kraft exterior liner, fluted medium core, and interior liner, rated at 32 ECT (Edge Crush Test)
• WEIGHT: Each individual box weighs approximately 0.35 pounds when flat; knocked-down flat profile measures 4 x 18 inches with 0.25 inch thickness for compact storage before assembly
• CONSTRUCTION: Interlocking flap closure system with top and bottom flaps that fold inward and seal with tape; boxes ship flat and fold along pre-scored lines into rectangular shape
• ORIGIN: Manufactured in the United States from content brown kraft paperboard

Description

Supply Air 4x4x18 Corrugated Shipping Boxes are constructed from single-wall corrugated cardboard with 32 ECT (Edge Crush Test) rating. Each box measures 4 inches in length, 4 inches in width, and 18 inches in height when assembled. The boxes ship flat and fold into a rectangular shape. The brown kraft exterior is manufactured from content. Each box weighs approximately 0.35 pounds. The closure method consists of interlocking flaps that fold down and can be secured with packing tape. The corrugated construction consists of an outer liner, inner liner, and fluted medium layer. These boxes accommodate items measuring up to 3.75 x 3.75 x 17.5 inches interior dimensions after accounting for wall thickness. The tall 4:1 aspect ratio profile fits long narrow items including posters, rolled documents, bottles, tubes, and vertical products. Manufacturing occurs in the United States. Each box arrives knocked down flat for storage efficiency. Assembly process: fold along scored lines, tuck side panels, fold bottom flaps inward, secure with tape, insert contents, fold top flaps closed, seal with tape. Available in multiple pack quantities to suit different volume requirements.