Part of J. Moritas "4H" series - only available in 4 hole connection. Head Diameter: 10.5mm Head Height: 13.2mm Power: 20 Watts Rotation Speed: 370,000 +/- 30,000 rpm (at 0.2 MPa) Air/Water Ports: Chip Air: 0, Water: 3 Weight: 50-56g Air Pressure: 0.2 – 0.29 MPa/29 - 42 psi Ceramic Body Coating