Needle Guide Back Catalog number: 11-2591 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21243 1/16'' Ferrule set, 2/pk Price on request CTS-A11133 Tube Assembly, Transducer to Check Valve Price on request CTS-10788-5 Needle Wash Frit, 5/pk Price on request