This is a Seadoo Jet Pump Trim Rod Sliding Block Protector. It will fit all models '88-'99 that apply.
OEM Part#: 271.000.459
In the pictures below, you will see other parts for different models, such as trim parts and other fitting. You can click the below part numbers to access and view the supporting items.
003-435 Trim Rod Sliding Block 278.001.698
003-430 Bailer Line Fitting 293.700.017
003-431 Cooling Line Fitting 293.700.019