Tube Holder Single Variable Flow, only Back Catalog number: 800072 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 811-9976-20 Sorbent Tube, XAD-2, 6X110, 150/75, 20/BX Price on request 800142-10 Tube Holder Collar Clip, for 3/8" OD, 1/4" ID Tubi Price on request