Tube gas sampling 350, nozzle (GL14), septum Back Catalog number: OST-201-3421 Availability: In the manufacturer's stock Price on request - + Recommended U-T18325-2S EPA 325 cold trap, UNITY 2/xr and TD-100/xr Price on request C-TDKIT-02 Essential Automated TD Starter Kit Price on request C-CL100 Penclips, pk100 Price on request