The PYI PSS Dripless 02078114 shaft seal is a dripless stuffing box and packing gland replacement for sailboat and power boat drivetrains. The PYI PSS packless dripless 02078114 shaft seal is a mechanical seal that uses a self-aligning carbon-graphite stator to ensure a 100% watertight seal. The PYI PSS Dripless 02078114 shaft seal will eliminate shaft wear and minimize corrosion. The PYI PSS Dripless 02078114 shaft seal measures Shaft Size: 7/8 inches, Stern Tube O.D.: 1-1/4 inches thru 1-3/8 inches, Compressed Length: 6-1/4 inches