Formaldehyde 0.05-4.0 ppm Gas Detector Tube, pk/10 Back Catalog number: 171SC Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9977-20 Sorbent Tube, XAD-2, 6X110, 120/60, 20/BX Price on request 200114 Tube Holder Housing, 7-10 x 175mm, 5/8", L265 Price on request 811-9983-50 Sorbent Tube, Porapak-Q 6X110, 150/75, 50/BX Price on request