PP Photo album, allbum MATERIAL: artwork paper COVER thinckness:2MM INNER sleeves:4R 24photos ;1UP,one photo oneach side 4R 36photos;1UP ,one photo on each side 4R 48/64photos; 2UP;two photos on each side 4R 96 photos; 3UP;three photos on each side we also can make size of 3R,5R,6R photos sleeves thickness is from 0.02MM to 0.07MM OEM is welcome