High quality push buttons manufactured by Samducksa. These are a great premium alternative to Sanwa OBSF buttons. They offer a linear non tactile feel, with reduced travel distance thanks to the Cherry MX Silver microswitch. The Cherry MX switches themselves boasts a guaranteed 50 million consistent actuation presses, which compares extremely favourably against Sanwa OBSF's rating of 1 million presses. These are screw-in style buttons with with 2.8mm terminals and therefore fully compatible with the One-Zero wiring harness.
Please note that the Cherry MX switches can have "spring ping" and reverb sounds. The sound can get louder inside an enclosure and is caused by the spring inside the switches.
If the noise bothers you, then you can fix it by lubing the spring inside the affected Cherry Mx microswitch. It should be said that the spring ping sound is not noticable during normal gaming volumes :)
If you are looking for other brands and colours why not try purchasing buttons from ArcadeWorldUK? The link is an affiliate link so any purchases made through it will help us!