20mm, green, snap in, concave buttons from Sanwa.
These 20mm buttons from Sanwa are commonly used to replace the "Start" and "Back/Select" buttons on Mad Catz "Standard Edition" and "Brawlstick" cases but can be used for any function you can imagine for a momentary activation button. Great for custom applications when you want smaller buttons for your menu navigation functions.
20mm width
.110 connections