Pack of 10 Units Block up the end of 100-240 V strip light with this end caps Used for 5050 single color high voltage LED Strip lights Width is 0.39in For configurable options on LED Strips, please search "Lighting EVER 4100063"on Amazon. About LE Lighting EVER, abbreviated to LE, focuses on creating the best lighting experience. Only high end LED and advanced optical design are adopted. Enjoy lighting with LE.