Description: 100% Brand new Propeller Shaft Oil Seal. Made of high quality plastic, durable. Fit for Yamaha 2 Stroke 15HP 18HP Outboard Motor. The item is completely compatible and interchangeable with the OEM. Easy installation. Specification: Material: Plastic Inner Diameter: 20mm / 0.8inch Package Includes: 1 Piece Propeller Shaft Oil Seal Note: Please make sure this part fits for your motor before order