With an operating temperature of roughly 250 degreeF, nylon bushings are self-lubricating and non-galling. Chemically, they are weak in the presence of sturdy acids but excel in the presence of hydrocarbon and alcohol. The Anchor Bushing Nylon Propeller Bore Reducer is a high-quality product built under stringent industry specifications to deliver a well-balanced design and a level of craftsmanship. It uses industry-leading materials and cutting-edge technologies to provide long-term reliability and value. Anchor Bushing's product ensures you a 100% quality guarantee that you will not resist buying. Key Features: Standard maritime taper with brass step keys Designed for optimum strength and endurance Perform well Extensively tested to endure years of misuse. Robust, abrasion-resistant, and strong chemical resistance Self-lubricating and non-galling, at an operating temperature of roughly 250 degreeF Reduced component weight reduced operation noise, and reduced wear on mating parts Intended for use with trailer suspension systems Made from high-quality and trusted nylon material Specifications: Brand: Anchor Bushing, Inc. SKU: NB17 UPC: NB17 Weight: 0.95 lbs Shaft Diameter: 2" Size: 2 1/2 to 2" Material: Nylon Manufacturer Part Number (MPN): NB17 Replaces Products: 88-814, NB17 Standard marine taper and come with brass step keys.