250 μL Syringe, High Pressure Back Catalog number: CTS-21469 Availability: In the manufacturer's stock Price on request - + Recommended CTS-1010T O-Ring, TFE Price on request CTS-10475 Sapphire Plunger Kit Price on request 11-2401 Check Valve Cartridge, Ceramic Ball & Seat, 2/pk Price on request