Check Valve Assembly, Outlet Back Catalog number: 11-1599 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21240 ACQUITY I-Class SM-FTN Performance Maint. Kit,2890 Price on request CTS-10987 717 Performance Maintenance Kit Price on request CTS-A11135 50μL Std. Zirconia Mixer Price on request