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 200187 Tube Holder Adapter, 3/16" to 1/4" Ends Price on request 800135 Tube Holder Collar Clip, for 1/2" OD, 3/8" ID Tubi Price on request