The cutless bearing, which supports the shaft and promotes smooth rotation, is found just before a propeller shaft connects to the propeller. Cutless bearings are often composed of bronze, marine-grade brass, or stainless steel and have a nitrile rubber lining. They are tube-shaped. Where the rubber hits the propeller shaft, there are grooves that allow water to pass through, lubricating the bearing. Cutless bearings have a long lifespan, but they will wear out more quickly if the propeller shaft is out of line. When you hear a clunking noise while driving, it may be a worn cutless bearing that is the issue. Key Features: Brass cutless bearing A top-notch brass outer shell is fused to a fluted rubber. 1 3/8 in. internal diameter 2 in. external diameter 5 1/2 in. long swaps out for Duramax Bold Product Specifications: SKU: DOGFISH Weight: 1.69 LBS Alternate Products SKU: "913752", "DOGFISH" Unit Of Measure: EA Manufacturer Part Number (MPN): E02000 Quantity: 1