4 x 36 Brown Mailing Tubes With End Caps .125 Gauge 12/Case Class A the second is the depth

the second is the depth of the gusset

Quality Gaffers Tape from PackagingSupplies

Quality 1/8" pink anti-static foam

Insulates non-flat surfaces such as fittings and valves

Brings attention to security and shipping instructions

4 x 36 Brown Mailing Tubes With End Caps .125 Gauge 12/Case Class A the second is the depthDurable 3 ply spiral wound mailing tube construction protects sketches, blueprints, graphs, posters, important documents, etc. Plastic end caps are friction fit to stay on during mailing. The flat cap surface is ideal for writing. These rigid mailing tubes resist folding or bending and can be reused. Sizes listed below are USABLE dimensions (amount of space AFTER end caps are inserted).