Volvo Penta Stuffing Box for shaft diameter of 1 inch and a sleeve diameter of 1.75 inches. On the seal edge is part number 888738.This is the moulded packing or stuffing box for the prop shaft. Simple, This packing box is specifically dimensioned for Volvo Penta propeller shafts and sleeves. Supplied complete with installation tools and a tube of grease.Shaft Diameter: 1 inch (25.4mm)Sleeve Diameter: 1.75 inch (44.45mm) (Tolerance +0.5/ -0.3)Measurement A: 36mmMeasurement B: 66mmVolvo Penta Part No: 3819724. (888738 on the seal)