DescriptionThe physics screw lamp bulb is a great helper for students to learn electronic science, improving their hands-on ability, thinking ability, creativity, and awareness of electricity. Easy to operate, simple and convenient.Features- Color: As shown. - Material: Glass. - Size: 2.50X1.50X1.50 cm/ 0.98X0.59X0.59 inch. - Rated voltage: 3.8V. - Rated Current: 0.3A. - Rated Power: 1.14W. - Replace the bulb by unscrewing the flashlight head from the body. - Made from premium glass material, which is durable and practical using. - These mini bulbs are simple to install and remove, you can easily replace old or broken bulbs - Great for building some circuit display boards, also used in equipment inspection lamps instrument bulb and more.- The product is essential electrical consumables for primary school science, middle school physics laboratory and students' home laboratory.