ITEM NAME:Dental Air Flow Teeth Polishing Polisher Handpiece 4 UKGRL Jet Prophy Z1Q9.Specially designed to prevent backflow and blockage. 1 x Air Polisher. Easy to replace of working heads or spray nozzles. Easy to be connected with 4-hole high speed connecting hose. Water Pressure: 0.05MPa - 0.5MPa.