Piston Seal Backup Ring Back Catalog number: CTS-10759 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-11315 Needle Seal, PEEK™ SIL-20 Price on request CTS-11010 515 Performance Maintenance Kit Price on request CTS-5531-05 Solvent Bottle Filter, 5/pk Price on request