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For 3/4 inch shafts, used in Vico brand pumps - SupreFlo, UltraFlo, and Ultimax.
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Good quality of Buna Graphitic plastic, includes rubber cup; not used in all applications.
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Use small amount of silicone grease to help seat seal rubber.
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MFG #'s: PS-2136, 48-0065-S, 5190-016, 5250-
265, 601090, PS2136, PSR- 2136, USSPS2136B.