Mat Board Center, 25 pack 11x17 Brown Cardboard sheet, 1/8 inch thick, Flat Corrugated Cardboard Inserts for Packing, Shipping, Mailing, Cardboard Backing, Art Craft Card Board

Use these flat card board to protect important documents from bending when posting them.

Multi-Purpose: Use these cardboard backing for photo backing, picture frame or welcome sign! It can be also used as cardboard inserts, corrugated packaging pads, cardboard dividers.

B-Flute 1/8" corrugated cardboard.