TYPE - 25pcs Mini Light Bulb Mounting Base, Work for all kinds of LED light, Halogen bulb, CFL Light Bulb lamp. MATERIAL - Made of high quality Bakelite shell and brass contact, flame retardant, high temperature resistance, good conduction performance, low resistance, much safer to use. STRUCTURE - Consist of plastic screw bulb base, brass screw socket, Easy to install, there are two mounting screw holes, which can be easily fixed on a flat surface where you need. USAGE - Mainly used in electrical experiment of middle and primary school. It is a necessary electrical consumable material for primary school science, middle school physics laboratory and students' home laboratory,and car light DIY accessories and so on.Commonly used old flashlight accessories lamp holder. 25 PACK E10 Mini Bulb Holder DIY Physical Circuit Electrical Experiment Lighting Accessories Screw Type Light Socket Mounting Bracket Round Lamp Base