Air motor: - External Water Spray. - 1:1 Drive. - Midwest 4 hole. - 22,000R.P.M max (0.25MPa). Contra Angle: - For CA burs 2.35. - Max 30,000 R.P.M. - External Water Spray. - 1:1 Drive. - For burs (?2.35). - 22,000R.P.M max. **For further product information , please contact Chat Support**