Pinit BACKINGS for Japanese "B2" Posters. 20-1/4 x 29". .125" thick, B-flute Corrugated Cardboard. White both sides. Short-term Storage. SKU: KJA (0)No Reviews yet Add to Shopping Cart Details Japanese "B2" Poster Backings20-1/4 x 29".125" thick, B-flute Corrugated Cardboard.White both sides. Short-term storage.This corrugated cardboard is a... Details Back DetailsJapanese "B2" Poster Backings20-1/4 x 29".125" thick, B-flute Corrugated Cardboard.White both sides. Short-term storage.This corrugated cardboard is a popular choice for a poster backing board because it is rigid and economical. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review