Tube Holder Kit, Quad Variable, 6 x 70mm Back Catalog number: 800231 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9972-50 Sorbent Tube, TenaX, 8X110, 100/50, 50/BX Price on request 800251 Tube Holder Kit, Dual Variable Manifold (Includes Price on request 800170 Tube Holder Hose Barb Fitting Price on request