Pinit BACKINGS for 11 x 17 Photos. 11 x 17". 028" thick Acid-Free Board. White on both sides. Long-term Storage. SKU: KAF281117 (0)No Reviews yet Add to Shopping Cart Details 11 x 17 Print Backings 11 x 17" .028" thick Acid-free Board. White on both sides. Use for long-term Storage. Details Back Details11 x 17 Print Backings 11 x 17" .028" thick Acid-free Board. White on both sides. Use for long-term Storage. Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review