Tube Holder Collar Clip, for 1/2" OD, 3/8" ID Tubing Back Catalog number: 800135 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9971-50 Sorbent Tube, Silica (H2SO2), 6X70, 150/75, 50/BX Price on request 800075 Tube Holder Quad Variable Flow, only Price on request 800135-10 Tube Holder Collar Clip, for 1/2" OD, 3/8" ID Tubing (Packg of 10) Price on request