Needle Seal, PEEK™ SIL-20 Back Catalog number: CTS-11315 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21011 Cartridge Check Valve System Kit Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request CTS-A103 Outlet Check Valve Price on request