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 811-9965-50 Sorbent Tube, Silica Gel, 6X70, 150/75, 50/BX Price on request 800259 Single Tube Holder Kit, 7-10 x 110mm Price on request 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Price on request