... , C, D, E, F, G SF-52: 58, 66.5, 4.5, 26, 40.5, 52, 39mm SF-65: 73.5, 83.5, 4 ... , C, D, E, F, G SF-52: 58, 66.5, 4.5, 26, 40.5, 52, 39mmApplicationsSFIM's SF, DND, SFC series meters and ... factor,synchroscope, phase indicator and the other non-electric value. SF-52 Round Panel Meter(SFIM)