Black Plunger Seal Back Catalog number: CTS-6613 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21421 PM Kit, 1290 Binary Pump Price on request CTS-11315 Needle Seal, PEEK™ SIL-20 Price on request CTS-11371 ACQUITY I2V BSM Performance Maintenance Kit Price on request