The PYI PSS Dripless 0240M234 metric shaft seal is a dripless stuffing box and packing gland replacement for sailboat and power marine drivetrains. The PYI PSS packless dripless 0240M234 metric shaft seal is a mechanical seal that uses a self-aligning carbon-graphite stator to ensure a 100% watertight seal. The PYI PSS Dripless 0240M234 metric shaft seal will eliminate shaft wear and minimize corrosion. Save big on PYI PSS Dripless 0240M234 metric shaft seals for inboard shafts. The PYI PSS Dripless 0240M234 metric shaft seal measures Shaft Size: 40 mm, Stern Tube O.D.: 2-3/4 inches thru 2-7/8 inches, Compressed Length: 8-1/8 inches