Pinit BACKINGS for British Quad Posters. 30 x 40". .1875 thick Foam Board. Acid-free & Buffered. Indefinite storage. SKU: KBQPFC (0)No Reviews yet Add to Shopping Cart Details MUSEUM GRADE British Quad Poster Backings 30 x 40" .1875" thick Foam Board. Acid-free & Buffered Board All white. Indefinite storage. Details Back DetailsMUSEUM GRADE British Quad Poster Backings 30 x 40" .1875" thick Foam Board. Acid-free & Buffered BoardAll white. Indefinite storage. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review