This is a high-quality aftermarket product. Replacement front seal kit compatible with SeaStar pivot / front mount cylinders. Kit fits most outboard boats with single or twin engines.Fits front mount cylinder parts as below: HC5340, HC5341, HC5342, HC5343, HC5344, HC5345, HC5346, HC5347, HC5348, HC5358, HC5365, HC5375, HC5394, HC5445, HC6750, HC6751, HC6752, HC6753, HC6754, HC6755.