Plunger Seal Back Catalog number: CTS-10693 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10984 Sparge Diffuser Price on request CTS-10560 Seal Wash Plunger Seal, Alliance, 2/pk Price on request CTS-21095 Seal Wash (0.0787 ID, Fixed, Bio), 2/pk Price on request