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 800063 Tube Holder Housing End, 1/2" for 5mm OD Price on request 800064 Tube Holder Housing End, 5/8", for 7-10mm Price on request 800251 Tube Holder Kit, Dual Variable Manifold (Includes Price on request