Sapphire Plunger Back Catalog number: CTS-11425 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10328 Optics Cover Window Price on request 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request