Needle Guide Back Catalog number: 11-2591 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-5531-07 Solvent Bottle Filter, 7/pk Price on request 11-2525 1/4" Short Comp. Screw (Gold-Plated), 10/pk Price on request CTS-21480 Check Valve, Cartridge Price on request