BICYCLE CROCODILE( ENGLAND )CO,LTD ...
That size can be used with the handbars. Normal size normal
It is a rubber casing. Need to wear a handlebar first.
next ..Then put the aluminum grip casing. Then screw the hex nut screw.
*Aluminum grip casing can be disassembled (the last photo shown detail).
* it is rare item very nice and new old stock