Tube Holder Single Variable Flow, only Back Catalog number: 800072 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 200157 U-Tube replacement for P/N 800143 Price on request 811-9983-50 Sorbent Tube, Porapak-Q 6X110, 150/75, 50/BX Price on request 179S Sensidyne Gas Detector Tubes, Ethyl Benzene (10-500 ppm), pk/10 Price on request