Design Engineering 010839 Hi-Temp Heat Shrink Tubing Kit for Wires and Cables, 3/ 6/ 9mm x 4' each - Black Excellent water-tight wire protection for any powersports application Operating temperature range of -67 degrees Fahrenheit to 275 degrees Fahrenheit Use to insulate wires, connectors, terminals, wire splicing and more Easy to install using heat gun Professional grade military spec polyolefin tubing provides protection from dirt, dust, solvents, and foreign materials as well as strain relief