Pinit Picture Frame Backings 18 x 24". .0625" thick pH-neutral. Buffered Matboard. White two sides; cream core. Long-term Display. SKU: KF1824-MBW (0)No Reviews yet Add to Shopping Cart Details 18 x 24" Picture Frame Backings .0625" thick, pH Neutral, Buffered Matboard. White two sides; cream core. Use for long-term display. Details Back Details18 x 24" Picture Frame Backings.0625" thick, pH Neutral, Buffered Matboard. White two sides; cream core. Use for long-term display. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review