Tube Holder Kit, Quad Variable (Includes 6x70mm, 7 Back Catalog number: 800249 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9980-50 Sorbent Tube, XAD-7, 6X70, 60/30, 50/BX Price on request 800134 Tube Holder Collar Clip, for 7/16" OD, 5/16" ID Tu Price on request 811-9969-20 Sorbent Tube, Silica, DNPH, 6X110, 300/150, 20/BX Price on request