Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Back Catalog number: 800254 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9984-50 Sorbent Tube, Porapak-R 6X70, 70/35, 50/BX Price on request 800263 Single Tube Holder Kit, 5 x 150mm [Kitagawa TWA Tu Price on request 811-9977-20 Sorbent Tube, XAD-2, 6X110, 120/60, 20/BX Price on request