Strathmore 500 has been the favorite of fine arts illustrators for more than a century. Created in 1893, this 100% cotton fiber, acid-free bristol is an industry standard. - Strathmore Bristol Pad - 11" x 14", 2-ply, Vellum, 15 SheetsStrathmore 500 Series Bristol, 11X14 2PLY VELLUM -