Tube gas sampling 350, nozzle (GL14), septum Back Catalog number: OST-201-3421 Availability: In the manufacturer's stock Price on request - + Recommended U-COV45 O-Ring, low-emission, 5.92mm i.d. pk10 (6mm Difflo Price on request 1970-0234 O-RING-234 For High Flow Damper Plate Price on request U-T5O3F-2S Ozone precursors/Freon cold trap Price on request