... Functions: 1) SPDT , 2)SPST Normal Open , 3) SPST Normal Close SPDT/SPST Normal open or Normal close Micro switch and inching switch ... Series : 1) Certificates: SEMKO, UL approval2) SPDT/SPST(normal open and close),4type handles,3 types terminals3)Specifications 1 ... and the electromotional instruments field etc. SPDT/SPST Normal open or Normal close Micro switch and inching switch products Series