Package Included : 1X Planetary reducer 4X Install screw Reducer parameters: Model: PLF080-4-19-70-90 Speed Ratio: 4:1 Product type: Planetary Gearbox Input Shaft: 19mm Output Shaft: 20mm Body length: 64mm Backlash Precision: 7 ~10 Arcmin Rated torque : 90Nm Max radial force: 400N Max axial force : 420N Torsion rigidity: 4.7Nm/arcmin Max enter speed: 6000rpm Rated input speed: 3500rpm Noise: lower than 60dB