Features 1、High Quality CO2 Laser Head, suitable for laser engraving machine. 2、Made of aluminum material, wear resistant, solid and durable. 3、Black oxidation coating, resist to rust and corrosion. 4、Integrative fixture mount with air assist nozzle. 5、Precision CNC machining, stable performance, long lifespan. Specification Features: High Quality CO2 Laser Head, suitable for laser engraving machine. Made of aluminum material, wear resistant, solid and durable. Black oxidation coating, resist to rust and corrosion. Integrative fixture mount with air assist nozzle. Precision CNC machining, stable performance, long lifespan. Specification: Lens Diameter: 20mm Focal Length: 50.8/101.6mm Material: Aluminum Color: Black Options: No Mount Plate, with Mount Plate Package list: 1 x CO2 Laser Head 1 x Gasket 4 x Screws OR 1 x CO2 Laser Head 1 x Gasket 4 x Screws 1 x Mount Plate (Based on your choice) Package List