WPF 080 L2 -25-P2-S2 gearbox, the output shaft diameter is 19mm. It is used for 80mm, 110mm AC servo motor, input diameter is 19mm.Gearbox DrawingGearbox Output TypeGearbox Performance ParametersProduct: WPF 080 L2 -25-P2-S2 gearboxOutput shaft diameter: 19mmCompatible servo motors: 80mm, 110mm AC servo motorsInput diameter: 19mm