O-ring for under Surge model 'c' and 'p' Pulsators.
also fits Mini Cup and Lo Profile Siphon milker
original Babson surge number 10335
10YSU - 910532
Included in 4310 Rebuild Kit
5105 Rebuilt C Model Pulsator
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Dairy Farm Supplies & Equipment for Cows, Goats, and Sheep
This o-ring appears to be thicker than the one it replaces which creates a good seal.