Heavy-duty SJTW cold weather extension cord. Withstands harsh, winter temperatures. Rated for -58 Deg (degrees) F (Fahrenheit) to 140 Deg F. All-copper wire construction. Ideal for use with heavy-duty equipment and tools. Features a highly visible bright blue jacket which provides extra safety as well as prevents loss and theft on jobsites. Extra durable, oversized, clear molded plug prevents accidental bending or breaking. UL (Underwriter’s Laboratories) listed.