Tube Holder Single Variable Flow, only Back Catalog number: 800072 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9969-100 Sorbent Tube, Silica, DNPH, 6X110, 300/150, 100/BX Price on request 811-9983-50 Sorbent Tube, Porapak-Q 6X110, 150/75, 50/BX Price on request 800170 Tube Holder Hose Barb Fitting Price on request