Sapphire Plunger Back Catalog number: CTS-10323 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-6613 Black Plunger Seal Price on request CTS-00230-02 O-Ring, PTFE Price on request CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request