... rotating window, brass internal and connection. Product Name:iron case with chrome plated Pressure Gauge 1) Dial size: 1.5, 2, ... bsp (g, pf), bspt (zg, pt)4) Case material: black steel, plastic, chrome plated steel, stainless steel,iron5) Material of connection and ... internal: brass, chrome plated brass, stainless steel6) Scale: single or double with psi ...