Buy it now is for a 9 point 22t cog. These were designed for use on the VANMOOF range of bikes.
VANMOOF S3/X3 - Handlebar + Grips + Buttons + Brake Lever
VANMOOF S3 - Stand - complete
Brompton 12T Rear Sprocket 3/32 9-Spline QRSPR12DR-SHMNO 1/2 Speed
Vanmoof Front Fork S3 Replacement Genuine Part New Unused
ZIANTENNY Bicycle Bottom Bracket Tool Road Bike Square Spline Axis Bottom Bracket Secure Grip Removal Rod for Precise Disassembly – Universal Fit for Square Taper/Spline Axles Bike Maintenance Tool
Vanmoof Essentials Cycling Jacket Medium