This universally designed gauge monitors pressure up to 250 PSI on air compressors and tanks. It features an easy-to-read 1-1/2 in. face, 1/4 in. back connect and is a universal replacement or upgrade for most brands, including Powerfist's 3-, 7- and 20-gallon portable air compressors (8474959, 8474975 and 8474983).