Tube Holder Triple Variable Flow, only Back Catalog number: 800074 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9989-20 Sorbent Tube, Beaded Carbon, 6X70, 140/70, 20/BX Price on request 800142-10 Tube Holder Collar Clip, for 3/8" OD, 1/4" ID Tubi Price on request 800238 Tube Holder O-Ring Kit Price on request