Nuts sizes : M16 X 1.5
M14 X 1.5
M12 X 1.25
They are all of axle outside nuts . washers. spacers.
Show as pictures .
Also we have many sizes of electric bike motor hub freewheel / cassette spacers for sale :
Cassette hub spacers eBay item number : 272374048109
Freewheel hub inside spacers eBay item number : 281722873510
USA seller
USPS first class mail with tracking