Check Valve Assembly, Outlet Back Catalog number: 11-1599 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11151 Needle Assembly, PEEK™ Price on request CTS-10328 Optics Cover Window Price on request 11-2525 1/4" Short Comp. Screw (Gold-Plated), 10/pk Price on request