Tube Holder Collar Clip, for 1/2" OD, 3/8" ID Tubi Back Catalog number: 800135 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9985-50 Sorbent Tube, Florisil, 6X70, 100/50, 50/BX Price on request 800260 Single Tube Holder Kit, 7-10 x 150mm Price on request 800231 Tube Holder Kit, Quad Variable, 6 x 70mm Price on request