Tube Holder Kit, Quad Variable (Includes 6x70mm, 7 Back Catalog number: 800249 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800071 Tube Holder Housing End, 5/8", for 1/4" OD, Open E Price on request 811-9971-50 Sorbent Tube, Silica (H2SO2), 6X70, 150/75, 50/BX Price on request 811-9902-50 Charcoal Tube, Coconut Shell, Large, 200/400mg, 8x Price on request