The focusing tube of the CO2 laser cutting and engraving machine is suitable for installing a CO2 laser head with an aperture of 21mm.1. A device for installing a focusing lens, made of aluminum with a black red oxide layer.2. Integrated laser focusing head with air-assisted nozzle.3. The fixing ring has a plastic protection ring to protect the lens.4. Product size: see detailed pictures.5. Suitable for lens diameter: 20mm. Lens focal length: 50.8mm.Company Profile:Dongguan HUNST Laser Technology Co., Ltd. was established in 2008 and is located in Dongguan, Guangdong, a world-famous manufacturing city. It is a high-tech company specializing in the research and development, production and sales of mid-to-high-end industrial laser equipment and related spare parts.Dongguan HUNST Laser Technology Co., Ltd. relies on the developed light industrial machinery and complete supply chain in the Pearl River Delta. After years of continuous development, we have high-quality employees with various professional skills. At present, we have a variety of product lines, covering CO2 laser cutting machines, laser engraving machines, large-size laser cutting machines, laser marking machines and a full range of laser accessories. Product application areas include: textiles, leather, clothing, industrial fabrics, advertising, craft products, printing, packaging, electronics, medicine, hardware tools, molds and many other industries.The company has a complete and scientific quality management system. The products are exported to Southeast Asia, Europe, North and South America, the Middle East, Oceania and other countries and regions, and are well received by domestic and foreign customers.The integrity and product quality of Dongguan HUNST Laser Technology Co., Ltd. are recognized by the industry. The products have passed the CE certification of the European Union and the export-oriented Alibaba Group member companies.Friends from all walks of life are welcome to visit, guide and negotiate business.