PM Kit, 1290 Binary Pump Back Catalog number: CTS-21421 Availability: In the manufacturer's stock Price on request - + Recommended CTS-11092 O-Ring, PTFE Price on request CTS-A096 Syringe Assembly, 250μL Price on request CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request