Range 0 - 100 PSI. Displays air bag pressure only, not weight on the axles. Two high accuracy PSI sensors and cables included. Designed to monitor your tractor and trailer air bag pressure. Red, Blue, or Green LED display. Mounts in a standard 2-1/16" hole. Limited lifetime manufacturer's warranty. Made in the USA.  

NOTE: This gauge fits Peterbilt and Kenworth models; 2005 and older. Also fits Freightliner, International, Mack, Western Star, and Volvo models with 2-1/16" gauges on the dash.