Range 0 - 150 PSI or 0 - 99.9 PSI. Two high accuracy PSI sensors and cables included. Designed to monitor the PSI applied to the brakes on the tractor and trailer. 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.