Springer controls n7smbn511, 30mm 3-pos. Sel., 1-0-2, spring return rt to center, 1 n.o. 1 n.c., blk this oil-tight 3-position selector is designed to fit in an industry standard 30 mm panel hole. 1 normally open and 1 normally closed contact are included. Please reference the contacts by position column to find the right selector for the job.