| Coates Medium Thick Charcoal x 25 Sticks Coates have been making charcoal in the traditionalmanner since 1819. The intense blacknessof natural willow charcoal makes it a perfect drawingtool and has been used by artists for centuries. Available in the following sizes: Specifications.. Jumbo 16-24mm Extra thick 10-15mm Scenics 8-12mm Medium 5-6mm Thin 2-3mm | | |