This item is a necessary accessory for DIY engraving machine. It is a professional laser-head with high speed and high stability. Professional laser-head with high speed, high precision and high stability. Bright violet light, easy for locating when engraving. Adjustable laser-head, easy to adjust, engraving with and high efficiency. Can be used to engrave bamboo, leather, cut paper, PCB or other materials. Suitable for DIY engraving machine, easy to install. Material: brass Color: yellow Light Color: Violet Power: 1500mW Wave Length: 405nm Input Voltage: 4.5-5V Diameter: 12mm Laser Working Temperature: 500 Celsius Item Size: 1 * 4.5cm / 0.39 * 1.77in(D * H) Item Weight: 18g / 0.65oz Package List: 1 * laser-head Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.