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 200505 Tubing, 1/8" ID x 1/16" W, Clear PVC, (3 ft) Price on request 103SD Sulphur Dioxide 1-60 ppm Gas Detector Tube, pk/10 Price on request 800254 Single Variable Flow Kit, 5 x 150mm [Kitagawa TWA Tubes] Price on request