Specifications: Air Consumption - ft3/min: 10.7 Air Inlet Thread N.P.T. - in: 1/4 Average Air Consumption - m3/min: 0.3 Collet Chuck Size - in: 1/4 Collet Chuck Size - mm: 6 Free Speed - rpm: 25000 Noise Level - dB(A): 85 Overall Length (approx) - in: 6 15/32 Overall Length (approx) - mm: 164 Rated Horse Power - w: 315 Weight - lb: 1.25