Hahnemuhle Photo Rag 308 Matte FineArt Photo Cards (4 x 6", 30 Cards) 100% Cotton Rag Base and Rounded Corners, Basis Weight: 308 gsm, Thickness: 18.9 mil, Opacity: 99%, Whiteness: 92.5%, Instant Drying & Water Resistant, Very Low OBA Content,...