... general use, black steel case, plastic rotating window, brass internal and connection. Product Name:iron-clad plastic jacket Pressure Gauge 1) Dial size ... and internal: brass, chrome plated brass, stainless steel6) Scale: single or double with psi (lb/in), bar, kg/cm2 (kgf/cm2 ... , mpa; in Hg, cmHg or mmHg)7) Accuracy: 3% - 2% - 3% , ±2.5%8)Lip Material: Plastic, plastic dial face, glass dial face9 ...