Tamiya Double Aluminium Roller (9mm - 8mm) - 15403

★These new 9-8mm aluminum rollers now join the popular double roller line-up. 

★Compared with the 13-12mm rollers, they are smaller and about half the weight, offering your machine a wider variety of settings. 

★520 ball bearings included.

*Souce from : https://www.tamiya.com/english/products/15403/index.html