Tube Holder Dual Variable Flow, only Back Catalog number: 800073 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 200157 U-Tube replacement for P/N 800143 Price on request 200114 Tube Holder Housing, 7-10 x 175mm, 5/8", L265 Price on request 811-9969-20 Sorbent Tube, Silica, DNPH, 6X110, 300/150, 20/BX Price on request