Package Included : 1X Planetary reducer 4X Install screw Reducer parameters: Model: PLF080-50-19-70-90 Speed Ratio: 50:1 Product type: Planetary Gearbox Input Shaft: 19mm Output Shaft: 20mm Body length: 86.5mm Backlash Precision: Less than 12 Arcmin Rated torque : 90Nm Max radial force: 400N Max axial drive : 420N Torsion rigidity: 4.7Nm/arcmin Max input speed: 6000rpm Rated enter speed: 3500rpm Noise: lower than 60dB