Used on audio distr system 53670. modular constructed; black; plastic; 1.260 in. lg.; 1.957 in. w; 1.150 in. h; rated 125 milliamps resistive at 28 v dc; operating temp M65.0 to P85.0 deg. c; switching chamber shall be enviromentally sealed; bracket mtg; (4) 0.100 in. dia. mtg holes 0.900 in. by 1.090 in. mtg centers