Eaton M22-I1 grey surface-mount enclosure with high-grade steel screws. It is made of plastic. It has 2 x M16 at bottom, 1 x M20 at top, 2 x M20/M25 (1 x each side) lateral cable entry knockouts. The 216535 M22-I1Q is suitable for M22 series modular pushbutton switches.