This button set ONLY WORKS for r188 bearings. If you do not know the model of the bearing, please do not buy!!! 

A FEW DISINGENUOUS SELLERS FROM CHINA copied our product pictures and even the text. What they are selling is NOT THE SAME.

• The item contains ONE set of Black SS button
• Cap diameter is 19mm or 3/4". Installed height is 12mm
• Brand: Neo Spin
• Button Model Number: Lite
• Compatible with most spinners using r188 bearings, including those spinners with threaded bearing locks
• NOT COMPATIBLE WITH 608 bearings, 606 bearings, 688 bearings, or ANY OTHER BEARINGS OTHER THAN R188