... different types:1). Square type meter: 96X96, 80X80, 72X72, 48X482). Rectangular type meter: 60X80, 60X70, 100, 52, 60, 453). Round type meter: 62mm, 52mm ... , 65mm.Digital type panel meters main types: 96X96mm, 72X72mm, 96X48mm, 48X48mmAccuracy class ...