Pump Seal, Black Back Catalog number: CTS-10394 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11425 Sapphire Plunger Price on request CTS-21591 PM Kit, G4226A Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request