1PART NUMBER: Propeller hub kit replace part number are 835257K12, 835257Q12 for reference. Please check the part numbers whether it suits your vehicle before purchasing. 2HIGH COMPATIBILITY: specially designed for Mariner outboards 40 hp through 60 hp 4 stroke, for Mariner outboards 30 hp through 60 hp twocycle, for Mariner Command Thrust outboards 25 hp, etc. 3COMPLETE SET INCLUDED: Kit comes with a comprehensive set of components, including a forward thrust washer, reflex drive sleeve, rear hub washer, and a propeller nut, providing an all in one solution for your needs. 4PROTECTIVE HUB SYSTEM: The hub system in the kit is designed to cushion and protect the drive system from most shocks. It absorbs vibrations and reduces propeller shaking for better performance and longevity. 5ENHANCED PROPELLER PERFORMANCE: The kit enhances the performance of your propeller by reducing vibrations and providing it with better stability. It results in smoother, more efficient boat movement.