BACKINGS for One Sheet Posters. 27-1/4 x 41-1/4". .1875" thick Corrugated Cardboard. White both sides. Short-term Storage.

One Sheet Poster Backings
27-1/4 x 41-1/4"
.1875" thick, C-Flute Corrugated Cardboard.
White both sides. Short-term storage.
This corrugated cardboard is .1875"thick (C-Flute, white on 2 sides). It is a popular choice for a backing board because it is rigid and economical.