PSS Shaft Seal Shaft 4" Tube 2-1/2" 02-212-400. 625" Total Length (compressed) (Compressed A): 8.375" Rotor Diameter (B): 4.2" Carbon Cuff Diameter (C): 3.75" Stern Cuff Length (E): 2" The PSS Shaft Seal is the number one selling marine mechanical seal...