Ampersand Museum Series Pastelbord for Pastels, Charcoal, Pencils and Ink, Gray, 1/8 Inch Depth, 24X36 Inch (PB24) Gesso and clay coated hardboard panel with granular marble dust finish Similar to a sanded pastel paper but much more durable Coating is ph neutral and non-yellowing Can be used with wet or dry pastel techniques or acrylics 24 x 36 inches - 1/8 inch depth