The 16mm Billet Buttons are the smallest buttons we offer. They come with a raised top and are available with or without the led ring. Both model can be custom laser etched but the amount of text we can put on them is limited due to their smaller size. Outer engraving is not available on every model either. A good thing is the led ring also move with the button, giving more surface area to push them. All of our billet buttons* have a replaceable micro switch and are rated IP67. More product added weekly!