Alvin 28" Corrugated Fiberboard Square Tube, White, Self Locking - 3.5" I.D, Pack of 36 (Shipped Flat)

· This unique 3½" square tube is designed for easy insertion and removal of rolleddocuments, simple stacking for storage, and reduced weight for postal cost savings.

· Tubes come in three lengths and are made of crush-resistant white corrugated fiberboard. Features a self-locking closure that won't pop open, need tape, or glue. Shipped flat. 36/box