T10 wedge socket. Made of rubber. The socket has 6 inches of wire. Great for dashboards, dome lights, door lights and exterior lights. After time the contacts get corroded and need to be replaced. The pigtail wire makes it easy to hook up to the existing wiring. Fits T3 1/4 bulbs. Works with both incandescent or led bulbs. Wires are about 8 inches long and 18 AWG. Works great for custom and classic vehicles and motorcycles. Replace corroded t10 sockets with a new socket if you cannot figure out what is wrong with your current socket. These sockets need to be in perfect condition for truck stop and police. This is a open wedge socket.