Strathmore (580-42 500 Series Sequential Art Bristol, 2-Ply Vellum Surface, 24 Sheets Designed for the comic, cartoon, and graphics novel creation 2-Ply Vellum Surface, acid free Ideal for pencil, pens, charcoal, inks, airbrush, and light washes 11"x17" Tape Bound 24 Sheets per Pad