Please be sure your electric bike motor axle size before ordering. 
C washer for adjust motor wheel disc brake --- Don't need take off your motor wheel . 
Torque arm : M14 torque arm fits M12 . M14 motor axle . M16 torque arm fits M16 motor axle. NEVER put M16 torque arm on M12 axle!!!
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
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