Triple Variable Tube Holder Kit, 6 x 70mm Back Catalog number: 800230 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 158S Sensidyne Gas Detector Tubes, Styrene (2.5-300 ppm), pk/10 Price on request 800238 Tube Holder O-Ring Kit Price on request 200157 U-Tube replacement for P/N 800143 Price on request