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 811-9975-50 Sorbent Tube, XAD-2, 8X110, 400/200, 50/BX Price on request 800074 Tube Holder Triple Variable Flow, only Price on request 811-9981-50 Sorbent Tube, Porapak-N, 6X70, 88/44, 50/BX Price on request