Pinit BACKINGS for Marvel Posters. 22 x 34". .1875" thick, C-flute Corrugated Cardboard. White both sides. Short-term Storage. SKU: KMP (0)No Reviews yet Add to Shopping Cart Details Marvel Poster Backings 22 x 34" .1875" thick, C-flute Corrugated Cardboard. White both sides. Short-term storage. Details Back DetailsMarvel Poster Backings 22 x 34" .1875" thick, C-flute Corrugated Cardboard.White both sides. Short-term storage. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review