This is a shaft seal used on the Waterway Tiny Might Barbed pump. The seal helps to prevent water from getting on the electrified part of the motor. Specs: Shaft Seal Head Type - B Model - PS-671 Quality/Material - Good - Buna Graphitic Plastic Shaft Size - 3/8" Seal Outside Diameter - 1-1/8"dia Seal Height - 15/32" Mating Ring Diameter - 7/8"dia Mating Ring Thickness - 5/32"
