BIC-20AWGRED12 Plated Copper Lugs: These UL-listed lugs are made from tin-plated copper tubing with 3/8" holes. Heat-Shrink Tubing: This tubing insulates the copper lugs and compression terminals. UL-Listed Battery Cable: This fine-stranded, very flexible cable is UL-listed. Rated MTW/THW/AWM, 60 Volt, sunlight resistant, direct burial, 105 degrees C. Assembled in the USA