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 811-9903-20 Charcoal Tube, Coconut Shell, Jumbo, 200/800mg, 10 Price on request 800139 Tube Holder Adapter for 1/2" Ends Price on request 811-9970-50 Sorbent Tube, Silica (Spec Clean), 7X110, 50/BX Price on request