Sorbent Tube, Porapak-R 6X70, 70/35, 50/BX Back Catalog number: 811-9984-50 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800073 Tube Holder Dual Variable Flow, only Price on request 103SD Sulphur Dioxide 1-60 ppm Gas Detector Tube, pk/10 Price on request 200187 Tube Holder Adapter, 3/16" to 1/4" Ends Price on request