flush spring return pushbutton switch 1.manufacture factory 2.Fix diameter:22mm 3.Max 380V AC/ 220V DC 4.Certificate:CE;CCC XB2 Series Pushbutton switches 1 ... reference:flush head,mashroom head,spring return,turn release,turn to stay up, ... dobble button,with key,with light,self-lock,self reset,convex,waterproof... flush head spring return pushbutton switch ...