1、Excellent PVC Material: This electrical nuts caps are made of excellent PVC material, which can effectively prevent the unstable connection of the leakage box and improve the safety and insulation. 2、Wide Application: This electrical nuts caps can be used for home theater, speaker wires, stereo wiring, automotive, marine wiring projects, home wiring projects, commercial or residential applications and more. 3、Thermoplastic Shell Cover: This electrical nuts caps feature a rugged thermoplastic shell cover that can withstand extreme environments with a maximum temperature rating of 221°F (105°C). 4、Easy To Install: This electrical nuts caps are very easy to install, all you need to do is screw it into the appropriate place. 5、Multiple Colors: This electrical nuts caps set comes in 5 different colors, each color corresponds to a different size for easy identification and selection.