Sapphire Plunger Back Catalog number: CTS-11425 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-10548 Gold Plunger Seal, Analytical Heads Price on request CTS-21266 Bearing Ring Price on request 11-4048 PEEK™ Needle Seal, SIL-30AC, SIL-30ACMP Price on request