aspectLED's silicone end caps are designed to fit specifically on our Waterproof Flexible LED Strip Lights. We offer sizes to fit every variety of our waterproof strip lights. These end caps come with wire lead holes in the ends to accomodate passing wires through the end cap. Waterproof LED Strip Light Silicone End Caps allow you to cut your waterproof strip light to length and recap the end of your cut strip to make the strip waterproof again. To make the strip waterproof after cutting, fill the silicone end cap with wet silicone and slide end cap onto the cut end of your strip light. Allow to dry for 24 hours before using or installing the strip light. FOR USE ONLY WITH aspectLED Waterproof Flexible Strip Lights.