Check Valves (400ul (#4), 500ul (#5), 900ul (#6

OPTI-MAX® Check Valve Replacement Cartridges, 2 pack

OPTI-MAX® EF Outlet Check Valve 3/16" Ceramic Ball & Seat, PEEK Cartridge, Waters 400 µL (#4) & 900 µL (#6) Heads

Part #39-68-01267

OPTI-MAX® EF Outlet Check Valve 3/16" Ceramic, SS Cartridge, Waters

Part #39-66-01267

OPTI-MAX® EF Outlet Check Valve 3/16" Ruby/Sapphire, PEEK Cartridge, Waters

Part #39-69-01267

OPTI-MAX® EF Outlet Check Valve 3/16" Ruby/Sapphire, SS Cartridge, Waters

Part #39-67-01267