Your search for "brass roller" revealed the following:
Hex Head Tire Valve Stem Caps in Chrome 2020128
$6.99Hex Head Tire Valve Stem Caps in Chrome 4pk. The Chrome plated brass construction provides superior strength, durability and lasting...
Lambretta Late Series 3 Throttle and Gear Roller Set
$15.99Lambretta late series 3 throttle and gear roller set.