Zero retraction handpiece with air regulator 100% zero retraction Prevent cross infection. Features: - Integrated stainless steel, strong head design. - Standard head size, flexible accessibility. - Air pressure regulator, worry-free in air flow input. Specifications: - Chuck type: Push button. - Cartridge: Exposed type. - Adaptor: Fixed four holes(M4). - Bur: ISO1797-1 φ1.6. - Working pressure: 0.23~0.25MPa. - Rotating speed: >300krpm. - Working water pressure: 0.2 (MPa)-0.4(MPa). - Water flow: ≧50m//min. - Water spray: Triple water spray. - Autoclave: 134 °C sterilization. - Noise: ≤80dB. - Head diameter: Φ11.2mm. - Head height: 13.45mm. - Surface: Titanium coating. - Bearing: German ceramic bearing.