Powerslide MAG Spacers are made of super lightweight magnesium. They fit all common inline skates featuring axles with 8mm diameter and all common wheels that have a total core width of 24mm. The spacers are 10,20 to 10,25mm wide and will save you quite some weight.

Spacer: Mag Spacer 8mm; length 10,2mm; fitting 608 PS bearings; sold in 8-pack