The product lets appropriate marking because of its thin wall adapted to the cable. It is endorsed to have printed yellow sleeves since yellow are not easily-soiled and it is a contrast in black print. A coating protects the marking. SILAVIA-TWIN markers can be printed only when requested. Contact the technical department for printing with alphanumeric graphic characters, with 1-2 slides or axial and longitudunal lines, with non-yellow color, with preferred length of markers.