3:1 4:1 5:1 6:1 8:1 Planetary Reducer a hundred thirty Planet Gearbox Hole output for 130mm Stepper Motor Nema52Packing: 1pcs/lot Note: This 130mm hole output planetary reducer with ratio 3:1 4:1 5:1 6:1 8:1 is for Nema52 stepper motor.We even have sequence of 57mm, 60mm, 80mm, 86mm, 110mm ... Right attitude planet reducer for patrons .This link is for ratio of Stage 1( velocity ratio 3/4/5/6/8:1), if needStage 2or Stage 3, check different hyperlinks in store or touch us.Low noiseSpeed adjustableLong existence characteristicsHigh torqueThe specification of 130mm Geared Planetary gearbox:Gear ratio 3:1 4:1 5:1 6:18 8:1 belong to Stage-1:The measurement of 130mm planetary gearbox:We have various units of planetary reducers for customers, you could find what you need in our store.Planet Gearbox*1