Tube Holder Quad Variable Flow, only Back Catalog number: 800075 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800263 Single Tube Holder Kit, 5 x 150mm [Kitagawa TWA Tubes] Price on request 800134 Tube Holder Collar Clip, for 7/16" OD, 5/16" ID Tubing Price on request 811-9962-50 Sorbent Tube, Chromosorb-102, 8X110, 100/50, 50/BX Price on request