Professional laser module, easy to install, with lower loss, provides 450nm wavelength, for efficient, precise engraving and cutting of plastic, wood, paper and so on, suitable for a wide range of eng more→raving machine. Features: High Quality Material: laser module, Features solid durable aluminium alloy shell, high engraving speed, low power loss, stability, long lifetime. Efficient Work: with adjustable focal length (5.5W/ 10W/ 20W) or fixed focal length (30W/ 40W/80W), flexible and easy to use, ensures fast, clear engraving with high efficiency, high precision. Powerful Ability: it can engrave plastic, wood, leather, rubber, acrylic and others, or cut wood and acrylic (the wattage determines …