... rotating window, brass internal and connection. Product Name:iron case Pressure Gauge 1) Dial size: 1.5, 2, 2.5, ... /83) Connection threads: npt, bsp (g, pf), bspt (zg, pt)4) Case material: black steel, plastic, chrome plated steel, stainless steel,iron5 ... , special printing acceptedOuter Packing:Cartons, packed in PVC belt iron case Pressure Gau