Color: Silver, as showed
Outside Diameter: Approx. 8mm
Inside Diameter: Approx. 6mm
Length: Approx. 24mm
Body Diameter: Approx. 11mm
Weight: Approx. 2.5g
These minimize drag on your bearings.
Solid aluminum construction dissipates head and will last longer than other plastic.
Reduces heat buildup and road vibration
It can upgrade your 4-wheel skates.