Wide applications: E10 miniature screw base light bulb can produce 3.8 volts at 0.3 amps, emitting bright and warm light to meet your lighting needs, ideal for building some circuit display boards, also popular in equipment inspection lamps instrument bulb and more | Size information: E10 miniature mini light bulb is about 2.3 cm/ 0.9 inches in length, small and easy to store, it won't take too much space in your home, but please keep them away from little kids to avoid swallowing risk; Please carefully check whether the product size is what you want before buying | Easy to install: these mini bulbs are simple to install and remove, you can easily replace old or broken bulbs without taking too much time; These mini bulbs are essential items when doing simple circuit lessons in the classroom | Warm reminder: the miniature E10 screw bulb has a warm white light and it won't hurt your eyes, please use the mini bulb within the rated voltage range, if the working voltage is too high, the mini bulb will be burned out; If the working voltage is too low, the mini bulb will not work | Package contains: you will receive 20 pieces of E10 mini bulbs, enough quantity that can meet your demands or replacement; Adopting quality glass, metal material, safe and reliable for us to use