Needle Guide Back Catalog number: 11-2591 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21192 Cartridge, BioAcquity, I2V Price on request CTS-11294 1515 Performance Maintenance Kit Price on request CTS-10285 TFE 3-Way Valve 4 (V4) Price on request