Tube Holder Kit, Quad Variable (Includes 6x70mm, 7 Back Catalog number: 800249 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9969-100 Sorbent Tube, Silica, DNPH, 6X110, 300/150, 100/BX Price on request 811-9984-50 Sorbent Tube, Porapak-R 6X70, 70/35, 50/BX Price on request 800261 Single Tube Holder Kit, 7-10 x 175mm Price on request