Pinit 18 x 24" Decorative Matboard with Window Choose from 3 Window Sizes and 18 Matboard Colors SKU: kmb1824w (0)No Reviews yet Add to Shopping Cart Details 18 x 24" Decorative Matboard with WindowMatboard has a cream-core and a white back. It is 55-60 point thick, pH neutral and buffered.Choose window si... Details Back Details18 x 24" Decorative Matboard with WindowMatboard has a cream-core and a white back. It is 55-60 point thick, pH neutral and buffered.Choose window size - 11 x 17", 12 x 18" or 13 x 19" Choose matboard color -18 choices Reviews 0 Back Ratings & ReviewsNo reviews availableBe the first to Write a Review