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 811-9966-50 Sorbent Tube, Silica Gel, 6X70, 100/50, 50/BX Price on request 800074 Tube Holder Triple Variable Flow, only Price on request 800134 Tube Holder Collar Clip, for 7/16" OD, 5/16" ID Tu Price on request