1Great workman and high practicality, good accessories for laser engraving machine 2Made of aluminum material with red oxide film, it will not easily oxidize 3Available in two laser head focusing lengths for your choice. 4Complete accessories, easy to install and remove 5Suitable for laser engraving machine Features: 1. Great workman and high practicality, good accessories for laser engraving machine 2. Made of aluminum material with red oxide film, it will not easily oxidize 3.Available in two laser head focusing lengths for your choice. 4.Complete accessories, easy to install and remove 5.Suitable for laser engraving machine Specification: Condition: 100% Brand new Lens Diameter: 20mm Optional Style: 63.5/101.6mm, 50.8/101.6mm(laser head focusing length) Package List: 1 x Laser Head 1 x First Reflector Mirror Frame 1 x Second Reflector Mirror Frame 1 x Fixed Plate 1 x Accessory (including 1x washer, 4x screws)