WirePath™ Heat Shrink Tubing has a 2 to 1 shrink ratio. So if you have a bundle of cables or wires from half an inch to 1 inch which you desire to form a smooth, tight fitting insulation for you application with a high degree of flexibility, we have you covered. WirePath™ Heat Shrink Tubing is very flexible, frame retardant and shrinks easily with a blower. Service temperature of 257ºF .WirePath™ Heat Shrink tubing is a lower cost alternative to polyolefin and is superior environmentally and more Ultraviolet (UV) stable.