Protective diaphragm, For use with: M22(N/O)-D-(R)-..., M22(N/O)-DL-..., M22(N/O)-DRL-..., M22(N/O)-L(C)-..., transparent version for harsh environmental conditions and application in the food industry, Do not use in conjunction with M22S-ST legend plate mount, since degree of protection cannot be guaranteed, additional protection for pushbuttons, Silicone