1. laser tube water pump 2. laser machine accessory 3. water pump 4. cooling laser tube 5. water protection function laser tube water pump Cooling tube, water protection: for ... as TR-5030, TR-5030H, TR-6040 and TR-6040H, water pump is enough for the cooling: For big items: TR-9060 ... and TR-1390, etc. Water chiller is better for better cooling: You can choose according ...