Plunger Wash Seal Back Catalog number: CTS-10391 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10476 Sapphire Plunger, Alliance Price on request CTS-10475 Sapphire Plunger Kit Price on request 11-4073 LC-30AD Plunger Holder Assembly, UHP2 (w/Diaphragm Price on request