Sanwa Denshi 24mm SOLID COLOR Pushbutton ( OBSF24 - XX )
The advantage that the Japanese buttons have over the American buttons is response time and accuracy. Use these yourself and you will be a true believer. At high levels of competition, each and every 'input' counts and for the most precise and responsive button, look no further than Sanwa buttons. They look great, but most importantly, perform to the highest standards.
Sanwa Pushbuttons (24mm Size) NORMALLY used for the START/SELECT on the Hori Sticks. If you want the PLAY buttons get the larger 30mm size.