36' x 36" Singleface Corrugated B-Flute Cardboard Roll *Single face Corrugated Flexible Singleface Corrugated conforms to all shapes and sizes. *Singleface is kraft "B" flute corrugated. *Approx. 1/8" flutes provide shock absorbing cushioning. *Use to protect metal or glass parts. *Great for shipping books. *Great Floor or Counter top protection during Construction