Sherwood® 23972 minor water pump repair kit, suitable for the following pumps: P1711, P1712 P1716(A, B-01, B-02, X) (WILL NOT FIT C, B-04) P1719(X, 01, F-02) P1722(A, B-01, B-02, X) P1727(A, FB, FB-01, FB-02, X) P1730(A, 01,02, F-01, F-02, X) P1731(01, F-02) P1733X, P1733F-01 The newer Sherwood pumps have a press on mechanical seal.  If you have a retaining ring and a washer holding on your mechanical seal then the seal in this kit will not fit. It is easy to verify this as soon as you remove the impeller. This kit contains:  Impeller 17000 Gasket 21570 O-ring 15945 Key 19667 Pin 21566 Snap ring, small 15952 Seal & seat 15955 Wear plate 24162 Seal 24250 Retention plug key 24626 Impeller specifications: Diameter: 3-1/4" ~ 82.55mm Width: 2-7/8" ~ 73.00mm Shaft: 20.00mm Blades: 12