Phoenix Contact WMTB HF (40x12)R YE is a medium-walled heat-shrink cable marker supplied as a roll, in yellow and without pre-printed text. Each label measures 40 x 12 mm and the sleeve suits cable diameters up to 6 mm, with 1000 individual markers per reel. The halogen-free material is designed for thermal-transfer printing and subsequent shrink application for durable, permanent identification. Typical use is in switchgear, machine wiring, and marine or offshore installations where legible, weather-resistant cable identification is required.