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 800062-10 Tube Holder Housing End, 1/2" for 6mm OD (Packg of 10) Price on request 811-9980-50 Sorbent Tube, XAD-7, 6X70, 60/30, 50/BX Price on request 800259 Single Tube Holder Kit, 7-10 x 110mm Price on request