Needle Kit, 15 µL with Needle Seat and Needle Guid Back Catalog number: CTS-21287 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21406 Peristaltic Pump Cartridge, WPS/AC Price on request 11-1596 Piston Assembly, Sapphire Price on request CTS-21012 Compression Screws & Ferrules, 1/16", SS, 5/pk Price on request