Needle Seal O-Ring, 002 Kalrez Back Catalog number: CTS-11149 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10984 Sparge Diffuser Price on request CTS-A11431-02 Cartridge Check Valve Housing, 2/pk Price on request 11-2401 Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Price on request