Bienfang 107 Canary Sketching & Tracing Rolls (also known as Bum Wad) are excellent with pencil, and are very good with inks and markers. These lightweight paper rolls have a fine surface texture and are used widely by architects, designers, engineers and students. Perfect for idea sketching, preliminary detail drawing, quick roughs, etc... Satisfactory for reproducing copies when required. Size: 12" x 50yd.