Specifications: Applicable for all kinds of indoor pipes Applicable for pioes of Φ40-150mm in civil projects. Mobile, easy and more pwerful operation. Using removable sectional flexible shafts, with large bending resistance, twisting resistance and ductility resitance. It can be extended to any length. Rated Power: 300w R.P.M: 1400 r/min voltage: 220v/50hz, 110v/60hz spare parts: 10M thick spring 8 M thin spring