Tube Holder Kit, Quad Variable (Includes 6x70mm, 7 Back Catalog number: 800249 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9977-20 Sorbent Tube, XAD-2, 6X110, 120/60, 20/BX Price on request 800062 Tube Holder Housing End, 1/2" for 6mm OD Price on request 800071-10 Tube Holder Housing End, 5/8", for 1/4" OD, Open E Price on request