This item is a necessary accessory for DIY engraving machine. It is a laser-head with high speed and high stability. laser-head with high speed, high precision and high stability. violet light, easy for locating when engraving. Adjustable laser-head, easy to adjust, engraving with good quality and high efficiency. Can be used to engrave bamboo, leather, cut paper, PCB or other flammable materials. Suitable for DIY engraving machine, easy to install. Material: brass Color: yellow Light Color: Violet : 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.