Sturmey Archer 3/32" Single Speed Freewheel 21T Cog Sprocket BMX Kids Cycle Bike
Teeth: 21T - Narrow. Screw on freewheel. ISO thread 1.375 x 21tpi. An envelope icon next to the order will show that it has been dispatched and if you hover over it with your mouse you will see the date of dispatch.