450nm 20W Laser Module with Protective Cover Adjustable Focal Length Laser Engraving Head for DIY Craft Wood Leather Fabric Paper Cutting Engraving

Features:
Upgraded version: Equipped with adjustable protective cover to protect your eyes, no need to wear extra laser glasses while working, safer to use than ordinary laser head.
With adjustable focal length (5.5W/ 10W/ 20W, 20-70mm) or fixed focal length (30W, 12.6mm/ 40W, 15mm/ 40W, 40mm). Made of premium quality aluminum alloy casing with great durability.
It can engrave paper, wood, fabric, plastic, leather, anodized aluminum, etc. Different laser modules for engraving/ cutting different kinds of material and different thicknesses.
Features high engraving speed, low power loss, good stability and superior performance, with fine heat dissipation to extend its service life.
Compact and lightweight, easy to assemble, has over 30cm long line. Comes with screws, convenient and simple to be installed on the machine.
Wide application, it's designed for laser engraver, laser cutting machine, 3D printer, CNC mill and so on, suitable for DIY lover, CNC engineer, artist and more
Note:
1. Avoid eye or skin exposure to direct or scattered laser light.
2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.