1. CO2 laser air pump 2. laser machine accessory 3. air pump 4. for blower during engraving CO2 laser air pump This air pump is for small machine series, such as TR-5030, TR-5030H, TR-6040 and TR-6040H. For big machine, such as TR-9060 and TR-1390, we matched with blower: You can choose according to your situation!