Feature 1OE Number: The referencing OE number of this water pump impeller are 173700001, 3008503, 217308, 8927570, 3N 4859, 3N1888, 3N8459. 2Fitment: The 12 blade water pump impeller is a replacement for Jabsco, replacement for Caterpillar, replacement for Cummins, replacement for Detroit Diesel. 3Parameter: The width of this impeller is 31/2in, the diameter is 33/4, the shaft diameter is 1in, designed with type 5 double flat drive and 12 blades. 4Function: Used to replace or refurbished the worn out impellers, it could provide higher flow and cooling flows, thus better protecting the ship's engine. 5Material: Made of marine grade and chemically resistant neoprene and brass, it is reliable, efficient and high performance, designed for long term use.Item Type:WaterPumpImpellerOE Number:173700001,3008503,217308,8927570,3N 4859,3N1888,3N8459Material: Neoprene, brassWidth: Approx. 3-1/2in (88.5mm)Diameter:Approx. 3-3/4in (95mm)Shaft Diameter: Approx. 1in/25mmDrive: Type 5 Double FlatNumber OfBlade: 12Fitment:ReplacementforJabscoReplacementforCaterpillarReplacementfor CumminsReplacementforDetroitDiesel .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x WaterPumpImpellerNotePlease double check the part number of your item, matching information is for reference only.If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!