Single Tube Holder Kit, 5 x 150mm [Kitagawa TWA Tu Back Catalog number: 800263 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800253 Single Variable Flow Kit, 6 x 70mm (Standard Charc Price on request 811-9984-50 Sorbent Tube, Porapak-R 6X70, 70/35, 50/BX Price on request 811-9971-50 Sorbent Tube, Silica (H2SO2), 6X70, 150/75, 50/BX Price on request