The MULTIMARK CD markers, with the strength F, suitable for stone, wood, metal, glass, overhead projector, CD's, etc. The liquid is particularly light-resistant and waterproof. At the end of the shaft is an integrated special rubber, which etches on almost all smooth surfaces. The line width is 0.6 mm. In this case are the 4 following colors are included: 1 red, 1 blue, 1 green and 1 black.