Tube Holder Kit, Quad Variable, 6 x 70mm Back Catalog number: 800231 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800149 Single Tube Holder Kit, 6 x 70mm (Standard Charcoal Tube) Price on request 158S Sensidyne Gas Detector Tubes, Styrene (2.5-300 ppm), pk/10 Price on request 811-9968-50 Sorbent Tube, Silica Gel, 8X110, 520/360, 50/BX Price on request