PF 090 L1 -25-P2-S2 gearbox, the output shaft diameter is 19mm. It is used for 80mm, 90mm, 110mm AC servo motor, input diameter is 19mm.Gearbox DrawingGearbox Output TypeGearbox Performance ParametersProduct: PF 090 L2 -25-P2-S2 gearbox for 80mm, 90mm, 110mm Servo motorOutput shaft diameter: 19mmInput diameter: 19mmCompatible motors: 80mm, 90mm, 110mm AC servo motorsCategory: PF Series Gearbox