Qanba Gravity KS Buttons Set of 30mm x 1 and 24mm x 3. I received these on Mercari about a year ago and used them, but I'm selling them because I bought different buttons. Please note that the 24mm buttons are all snap-in type, and the 30mm button is screw-in type. They work without any problems, but since they are used, there are fine scratches and scuffs on the top and sides of the buttons. Please purchase only if you understand the condition.