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 811-9972-50 Sorbent Tube, TenaX, 8X110, 100/50, 50/BX Price on request 800066-10 Tube Holder Collar Clip, for 1/4" OD, 1/8" ID Tubing (Packg of 10) Price on request 811-9988-10 Sorbent Tube, Chromosorb-106, 10X150, 600/300, 10/BX Price on request