Springer controls n7smbn011, 30mm 3-pos. Selector, 1-0-2, maintained, 1 n.o. 1 n.c., black 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.