Plunger Wash Seal Back Catalog number: CTS-10391 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11380 2690/2695 Performance Maintenance Kit w/Seal Pack Price on request CTS-10984 Sparge Diffuser Price on request CTS-11121-02 Wash Seal, 2/pk Price on request