Part of J. Moritas "4H" Series - works with 5 hole and 6 hole connections. Head Diameter: 9.0mm Head Height: 12.7mm Power: 20 Watts Rotation Speed: 370,000 rpm ± 30,000 rpm (at 0.2 MPa/29 psi) Air/Water Ports: Chip Air: 3, Water: 3 Light Intensity: 25,000LUX Weight: 48-57g Air Pressure: 0.2 – 0.29 MPa/29 - 42 psi Ceramic Body Coating Glass Rod Optics