Description Are you looking for a professional, yet reasonable lamp base? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our lamp base must meet your needs, this bulb holder is one of the best choices for you. Features -Color:Golden -Material:Copper -Size:1.90X1.20X1.00cm/0.75X0.47X0.39in Socket: E10 - Made of high grade copper material. Brass screw socket, easy to use. - Mainly used for electronic experiments in middle and primary schools. This is a necessary electrical consumable for elementary school science, middle school physics labs, and student home labs. - Popular old fashioned flashlight accessory lamp holders, popular science equipment in DIY physics teaching, and DIY accessories for car lights, etc. - This adapter allows you to use a small screw bulb in a small bayonet socket. - The excellent production process makes it have a good texture, can serve you for a long time, and will not be easily damaged. Package list: 50 x bulb holders