... by long flexible shaft, excellent for ventilation duct cleaning, strong motor, stable performance,with micro processor ... QX-4500C is a newly designed Flexible Shaft Cleaning Equipment, practical and user-friendly;2.Adopt highly-performed ... 1100W5.Flexible Shaft Length: 15m, torque:7.5Nm6.Cleaning Rotating Speed: 60~1300 RPM/min7.Control Mode: ... Flexible Shaft Air Duct Cleaner(Duct Cleaning Equipment)