Practical Lamp Holder: The lamp base with cable is mainly used to connect most E10 LED bulbs. A very practical lamp holder, can be used for experimental circuit testing. Easy to Distinguish: Each E10 LED holder has two wires, red and green. Red represents the positive pole and green represents the negative pole. Different colors are easy to distinguish and can be connected quickly. Multifunctional Lamp Base: The lamp base with cable socket can be applied to home, experimental circuit, electrical testing, physics teaching, and old-fashioned flashlight accessory holders. Durable Material: The wire in the e10 lamp holder bulb connector is made of ABS, has good compression and impact resistance, wear resistance, and is not easily damaged. The interior is made of copper, with high hardness, not easy to rust and corrosion resistant. Satisfactory Packaging: You will receive 20 E10 screw-mounted lamp sockets, the lamp holder size is 2.4*1.5 cm, the wire length is 20 cm. Sufficient quantity allows you to replace old or damaged bases. Material: ABS + copper Lamp base: 2.4*1.5 cm Wire length: 20 cm