Type: 10pcs Mini Light Bulbs, Base: E10, Voltage: 1.5V, Current: 0.3A, Light Color: Warm Yellow; Thread diameter: 9mm Good quality, bright light, durable in use, compatible with many power tools. Structure: Mini bulb is a tungsten filament bulb, made of glass, metal, and insulation materials. Can be used as a flashlight light source, and distribution box indicator light. Purpose: Mainly used in the 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. Usage: Popular in equipment inspection lamps instrument bulbs, airplane instrument hazard lights, torch bulbs, microscope Lamp, flashlight entertainment, and so on.