Anchor Bushing's Nylon Propeller Bore Reducer (NB11) goes from 1-1/2" to 1-3/8"D. This high-quality item is professionally crafted following industry standards to provide a well-balanced design a high level of craftsmanship. It is intended by using industry-leading materials and cutting-edge technology to provide long-term dependability and value. This product is clarified by unrivaled quality assurance. It is feasible to convert an inboard propeller with a larger bore to a smaller diameter shaft using Anchor Bushing propeller bore lowering bushings. All outdoor enthusiasts who like traffic-free driving and the feel of the wind in their hair will love this product. Thanks to the durable materials utilized in its design, it will give a long-lasting performance for many fun journeys to come. Key Features: Designed to provide maximum strength and endurance. To ensure it can endure years of usage. Unparalleled craftsmanship worked in the creation of this piece. The set includes a brass step key. Propeller shaft taper is standard SAE. For low-horsepower applications, nylon bushing is enough. Bronze bushings are a superior alternative for high horsepower applications. Product Details: SKU: NB11 UPC: NB11 Weight: 0.21 LBS Size: 1 1/2 to 1 3/8" Brand: Anchor Bushing, Inc Standard marine taper and come with brass step keys.