Tube Holder Housing, 5 x 150mm, 1/2", S255 Back Catalog number: 200104 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 103SD Sulphur Dioxide 1-60 ppm Gas Detector Tube, pk/10 Price on request 800134 Tube Holder Collar Clip, for 7/16" OD, 5/16" ID Tubing Price on request 179S Sensidyne Gas Detector Tubes, Ethyl Benzene (10-500 ppm), pk/10 Price on request