The adjustable lens tube height is 56-74mm. Red MaterialïŒâAluminum Material With Red Oxide Coating, Mirror Diameter :20mm, Lens Diameter: 12/18/20mm, Focal Length : 50., 8mm Some can use this laser beam set directly. Size Of 1st & 2nd Mirrounts Difference: Ony the Dia. Co2 Laser Head Set Ensemble De TĂȘte Laser Co2 Dia 20Mm Fl 50.8Mm Pour K2030 4060 K40 Co2 Laser... Focal Length of Lens: 50., 8mm. đUsed for Mirror Diameter: 20mm., Lens Diameter: 20mm. Before purchasing the product, please pay attention to whether the size of the product matches your machine. Packing List: 1 * CO2 Laser Head, 1 * 1st Mirror Mount, 1 * 2nd Mirror Mount Engraving Machine Machine Head Kit De CO2 FONLAND K Series Incl Laser Head, 1st 2nd Mirror Mounts Dia.20mm FL.50.8mm, For 2030 4060 K40 Laser Gravure Cutting Machine, Or TĂȘte Laser 20mm Diameter Laser Head Replacement đLens Tube Adjustable: The Dia. Integrative fixture mount with air assist nozzle, joint plate and belt fastener. Gold MaterialïŒâAluminum Material With Gold Oxide Coating, Mirror Diameter :20mm, Lens Diameter: 12/18/20mm, Focal Length : 50., 8mm đPackage 3PCS: 1 * Laser Head (D20 FL50., 8); 1 * 1st Mirror Mount; 1 * 2nd Mirror Mount. K40 CO2 Laser Head Set - Three Color Available Blue MaterialïŒâAluminum Material With Blue Oxide Coating, Mirror Diameter :20mm, Lens Diameter: 12/18/20mm, Focal Length : 50., 8mm đUsage: Replacement parts for Co2 laser stamp making/engraver machines. Sometimes, you need to make some modifications to the structure of the machine. FONLAND 10 Pcs Bulge Laser Nozzles Single Layer Caliber 2.0 by QDLASER offer easy operation, high quality, and versatile use