One Pair. Nylon shop made poppets.Ross Controls would not sell me just the poppetsfor my Ross dual safety valve model 3573A5142SO I SET UP MY OLD TURRET LATHE AND RAN A COUPLE HUNDRED.Figured if I had this problem, you did too.Made out of new 101 Nylon3/4" diameter with rounded faceTurned to 0.585" for spring1/8" bore for stemI believe these will fit most series 35 vlaves Any question please callRay @ 972-842-2207
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