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 800074 Tube Holder Triple Variable Flow, only Price on request 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Price on request 800139 Tube Holder Adapter for 1/2" Ends Price on request