This is a Buna rubber seal that fits the PSI mini screw blower snouts. The way to know if you have a PSI blower snout they are the only ones in the industry that use six 1/4" inch bolts and six 1/4" dowel pins to hold the blower pulley on.
RBS also stocks a full line of spiralox and snap rings to fit the snout as well. Seal measures 1.880" O.D., .250" thick and is for a 1.50" dia. shaft.
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