The Caloritech™ 159 Sleeving is designed to cover the bulb and capillary of an AR thermostat as protection against corrosion. All sleevings are 84" long. Sleevings are available in either PVC or Teflon®, and supplied either loose or installed. PVC sleevings support a maximum temperature of 95°C (203°F). Teflon® sleevings support a maximum temperature of 200°C (392°F).