1. laser tube water chiller 2. laser machine accessory 3. water chiller 4. cooling laser tube 5. water protection function laser tube water chiller Cooling tube, water protection:Matched with item: TR-9060 and TR-1390, etc. for small machine series, such as TR-5030, TR-5030H, TR-6040 and TR-6040H, water pump is enough for the cooling: You can choose according to your situation!