Features: 1. Application: Fits front mount cylinder parts: HC5340, HC5341, HC5342, HC5343, HC5344, HC5345, HC5346, HC5347, HC5348, HC5358, HC5365, HC5375, HC5394, HC5445, HC6750, HC6751, HC6752, HC6753, HC6754, HC6755( All Model Front-Mount Cylinders Except HC5340) 2. Function: Used to repair leaking or weeping cylinder seals. Rebuild the outboard front mount hydraulic cylinders, preventing the leaking of fluid and optimizing efficient performance 3. High Quality: Made of high-quality aluminum, steel, rubber, can be used for a long time use in marine environments., will not rust and wear. High precision ensure years of trouble-free use. .