For pipe freeze protection and roof and gutter de-icing, pre-assembled. Simple to design: 120 V version in 6, 12, 18, 24, 36, 50, 75 and 100 ft lengths each with a 6 ft power cord and 3-prong, grounded, lighted plug to show the system is on. Easy to install: pre-assembled with a plug and cold lead to avoid the need for connection by an electrician. Energy efficient and safe: self-regulating cable, no overheating possible even when overlapped or closely spaced. Reliable during long life: 2 year product warranty available, maintenance free.