Front Dimension : 18x18mm , 24x24mm , 18x24mm8mm dia. , 24mm dia. , 25mm dia.25mm dia. , 24x24mm , 24x30mmMounting Hole Size : 16mm dia.[ Flush Mounting : 21x21mm , 21x27mm , 22.5mm dia.]Switching Rating : 100§Å / 10§Ë bis 250V / 6AFront Protection : IP65Snap-action switching element , slow-make switching element,Low-level switching element.