Item Type: Bulb Socket Wire_x000D_ Material: Nylon, Red Copper, Rubber_x000D_ Compatible Bulb Specification: 3157 3057 3155 3357 3457 3757 4057 4114 4157 3156 3056 3456 4156 (Suitable for Single Double Lamp Tubes) 1Compatible Bulb Specification: 3157 3057 3155 3357 3457 3757 4057 4114 4157 3156 3056 3456 4156 (suitable for single / double lamp tubes) 2Save Time Effort: The lamp holder is equipped with pre wiring, which is convenient for plug and play installation and saves time and effort 3Durable: High temperature resistant nylon base and rubber gasket are durable and not easy to aging 4Material: Made of high quality nylon red copper rubber, with low transmission loss and high temperature resistance 5Copper Wire: Use copper connecting wire, has good conductivity, high temperature resistance, low transmission loss2 xBulb Socket Wire