This product is a black plastic end cap for our .5" deep triangular shaped black anodized LED Aluminum Extrusions to give your extrusion a clean and finished look. This cap will fit both the clear and frosted diffuser styles. This product is sold individually and in single units, end caps with wire holes are not yet available. If you need a whole for wiring use a small drill. This product is non water-resistant and not meant to be exposed to outdoor elements.