I am selling these keycaps because the color didn't match the keyboard I wanted to use them with. I purchased them from Yusha Kobo. This item is already sold out. Material: PBT Profile: Cherry Profile Printing Method: Dye-sublimation Keycap Thickness: Approximately 1.6mm (measured) Compatible Switches: Cherry MX switches, Cherry MX compatible switches Compatible Keyboards: JISplit89, 7sPro, Guide68, J67G, etc. Number of Keycaps: 189 Acid Caps' Premium series is upgraded compared to the Standard and Collection series in the following ways: ・Abundant convex keycaps from 1u to 3u are included. ・Color unevenness is suppressed by five-sided dye-sublimation printing. ・Keycaps sized for 40% keyboards are included. Please refer to the following article for other details: https://salicylic-acid3.hatenablog.com/entry/acid-caps-premium