A shim is a thin material, often tapered or wedged, that is used to fill small gaps or spaces between objects. Shims are commonly used to provide support, adjust for a better fit, or provide a level surface. Shims can also be used as spacers to fill gaps between worn-out parts. The shim is a simple attachment that connects the hull of a boat. Every hull is unique; some are mostly flat and don't require a shim. Shims are used to level out a marine engine. To withstand marine environments, they are made of an anti-corrosive steel plate. Features: provide support, make adjustments for a better fit, or create a level surface. Made to level out marine environment. made of an anti-corrosive steel plate Engineered to meet or exceed OEM standards. Made of high-quality materials. Specifications: Brand: Volvo Penta SKU: 967352 Weight: 0.00 LBS Diagram Reference Number: 28 Manufacturer Part Number (MPN): 967352 Volvo Penta Exploded view / schematic Lower Gear Unit