Alpinetech 16mm Anti-Vandal Momentary Stainless Steel Metal Push Button Switch Screw Terminal Dome Button Normally Open 1NO Momentary Type - Push & Hold ON, Release OFF Easy installation with screw terminals High IP67 Protection for used in wet or dusty enviroment. Stainless Steel material for resistant to wear and abrasion. Great for electronmagnetic Starter, relay, Horn Button Switch, PC Power Switch or any circuit controls.