M-D Building Products 4309  Pipe Heating Cable with Thermostat, 3-Foot This item is a M-D Building Products 4309 3-Foot Pipe Heating Cable with Thermostat Purpose of use for Rough Plumbing, pipe-heat-cables This product is manufactured in China Prevents frozen water pipes to -50F Easy to install just "wrap around" application Sensor light shows thermostat is working Available in 6 different lengths Built in thermostat