This propeller hub kit is perfect for Yamaha V4-6 and Sterndrive engines, as well as Mercury flow torque engines. It includes a 15 spline Flo-Torque design for maximum performance and reliability. The brand is Yamaha and Michigan Wheel, and the manufacturer part numbers are XHS103 and 835271A1. The kit is ideal for those looking to upgrade their boat's propeller system and improve their overall boating experience.