This Vintage Brass Pressure Gauge, made by T J Williams Ltd in the United Kingdom, is a 4" diameter gauge measuring 0-160 lb/in2. It has a 1/2 inch connection diameter and can be mounted in a side/bottom position. The maximum pressure it can measure is 60 psi (4.1 bar). While untested, this gauge is a classic piece of equipment for businesses or industrial use, showcasing the quality craftsmanship of the past.