The HellermannTyton 516-01778 is a slide-on cable marker with chevron cut, made for use with cables up to 3mm thick. It has a 1-3 mm white imprint, with the letter 'X'. The marker is designed to allow easy, quick installation onto cables without having to disassemble the wiring inside, and the white imprint is highly visible for easy identification in a variety of environments. The cable marker is made of polyamide, which offers excellent temperature, tear-resistance, and chemical resistance, making it an ideal choice for use in a range of applications.