PSS Shaft Seal 3" Shaft 4-1/2" Tube [02-300-412]PSS Shaft Seal 3" Shaft 4 1 2" Tube Shaft Diameter: 3" Stern Tube Diameter (D): 4 1 2" to 4 5 8" Total Length (A): 10. 425" Total Length (compressed) (Compressed A): 9. 175" Rotor Diameter (B): 5" Carbon Cuff Diameter (C): 4. 25" Stern Cuff Length (E): 2. 5" The 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