Tube Holder Collar Clip, for 1/4" OD, 1/8" ID Tubi Back Catalog number: 800066 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9984-50 Sorbent Tube, Porapak-R 6X70, 70/35, 50/BX Price on request 800230 Triple Variable Tube Holder Kit, 6 x 70mm Price on request 200131 Impinger Holder, Double, Aluminum, GilAir/HFS Price on request