This rebuild kit is for the Sherwood F85 or G65 water pump">raw water pump found on many Perkins 4-107 and 4-108 engines and the Westerbeke equivalent. This is a complete, new kit and includes the impeller and cover gasket, the shaft seal, two new bearings, the engine to pump flange gasket, an all stainless (316 grade) pump shaft and two stainless drive keys (one as a spare). The kit also includes a 7 page instruction booklet on rebuilding the pump as well as a support tube and the drifts you need to rebuild the pump successfully. All you need to supply are few basic hand tools (screwdriver, pliers and a hammer), some dish soap, a little bit of oil, and some cleaning supplies. The kit is well packaged and would make an excellent addition to the 'spares' locker. Cost is $145US plus shipping (package is 6x5x5 and weighs about 2.5 pounds). Item is located in British Columbia, Canada, but as I am just north of the border I can post it from the US (adds $10 to the cost as that is what US customs will charge me to take it south). I can also supply the kit without the drifts and instruction set and in that case the cost would be $130US plus shipping. Any questions - I'm happy to answer. This is a great deal - if you can find it, the original shaft costs about $100 by itself, and it is an inferior product comparied to the one in this kit! Please note that although the pictures show the bearings seperate from the shaft, when you get the kit the bearings will be installed on the shaft (unless you request otherwise).