Get your semi truck Ready for the Road Ahead™ with properly inflated tires, with the Milton 13-1/4" Straight Foot Dual-Head Chuck Service Gauge. Due to its ability to act as both a gauge and inflator, this replacement device is able to measure and inflate a tire's pressure level as needed. Engineered with a plated brass tube and 4-sided nylon indicator to withstand PSI levels ranging from 10-160. FleetPride is your First Click in Heavy Duty®.