Tube Holder Housing End, 1/2" for 5mm OD Back Catalog number: 800063 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 811-9966-50 Sorbent Tube, Silica Gel, 6X70, 100/50, 50/BX Price on request 158S Sensidyne Gas Detector Tubes, Styrene (2.5-300 ppm), pk/10 Price on request 400253 Tube Holder, Clear Storage Box Price on request