PSS Shaft Seal 1-12 Shaft 2-12 TubeShaft Diameter 1-12Stern Tube Diameter D 2-12 to 2-58Total Length A 9.175Total Length compressed Compressed A 8.175Rotor Diameter B 3.75Carbon Cuff Diameter C 3.25Stern Cuff Length E 2The PSS Shaft Seal is the number one selling marine mechanical seal worldwide and is installed as standard equipment by many of the worlds most reputable boat builders yards. The PSS Shaft Seal is also recognized as the premiere retrofit aftermarket seal on the world market. Cert