;Mounts into wood or metal control panels;Ideal for use within 3/4" wood control panels;Microswitch reliability tested to 10000000 cycles;Vertical attached microswitch with .187" (4.8mm) terminal;Classis Concave plunger designMounts in 28mm ~ 32mm hole.;Easyget 6 Pcs/lot HAPP Type Standard Arcade Push Button with Microswitch for Mame / Jamma / Arcade Video Games - 30MM Arcade Buttons (Black)