Eaton Moeller M22-T-D Button Boot is a Protective diaphragm, for use with: M22(S)-D…, M22(S)-L…, C22(S)-D…, C22(S)-L as additional protection for pushbuttons, Silicone transparent version for harsh environmental conditions and application in the food industry, Do not use in conjunction with M22S-ST legend plate mount, as degree of protection cannot be guaranteed, additional protection for pushbuttons.