Strathmore 300 Series Vellum Bristol - 11" x 17" (128 ratings) £9.95 Out of stock Weight: 100 lb. (11" x 17" x 24 sheets) 270 g/m2 Surface: Smooth / Vellum Media Applications: Smooth - pen & ink, markersVellum - coloured pencil, pencil, charcoal, sketching sticks, airbrush, pen & ink Strathmore 300 series Bristol weight board offered in two surfaces and three sizes... Smooth is ideal for both traditional and specialty pen and ink tools. Vellum is recommended for pencil, charcoal, sketching sticks, airbrush and is acceptable to pen and ink. Both surfaces work well with specialty pens and markers.