atomic market american style 28mm standard arcade push button 6 pack black with microswitch atomic market manufactured for atomic market to usa specs<br /><br /> 28mm diameter, standard size for us arcade machine<br /> mounts into wood or metal control panels up to 3/4" thick <br /> microswitch reliability tested to 10,000,000 cycles <br />vertical attached microswitch with standard 0.187" (4.8mm) terminals