The official Sanwa push button (OBSF-24), measuring 28mms in diameter. Used as standard in the majority of Japanese made arcade cabinets. Regarded as one of best buttons around.
Their are a couple of different sizes in this range. This is the smalled styled button. Also as with the other sanwa products the microswitch is inbuilt into the button. So, no need to purchase and fit microswitches seperately.
Product
Details
Factory ID: OBSF-24
Available colors: red, yellow, blue, orange, white, green, dark blue, violet