Product information Waterproof wood-cased pencil in 6 colours For opaque drawing and writing on almost all surfaces even on dark or transparent ones, e.g. paper, plastic, metal, glass, wood, leather and stone No bleeding through paper Wood from PEFC-certified, sustainably managed forests Sharpener recommendation: Mars double-hole sharpener 510 25 or tub sharpener 512 002 for ideal sharpening results