... connection. Specifications are as follows:1) Dial size: 1.5", 2", 2.5", 3", 3.5", 4", 6"2) Connection size: 1/8", 1/4", 1 ... and internal: brass, chrome plated brass, stainlesssteel6) Scale: single or double with psi (lb/in), bar, kg/cm2 (kgf/cm2Kpa, mpa ... ; in Hg, cmHg or mmHg)7) Accuracy: 3% - 2% - 3% , ?.5%Inner Packing:Paper box, special printing acceptedOuter Packing:Cartons, packed ...