8 Piece Aluminum Inline Skate Roller Skating Wheels Spacers for 8mm Description: _x000D_ 8 Pieces sturdy replacement inline roller skating wheels spacers The aluminum spacers stay truer and assure bearings won' into wheels Intall it between two bearings, the inner diameter of bearings will change from 8mm to 6mm Help you skate faster with less energy required to keep your body in motion _x000D_ Specification: _x000D_ Material: Aluminum Color: Silver Size(Length x Inner Diameter x Outer Diameter): Approx. x 6.3 x 7.9 mm/0.93 x 0.25 x 0.31 inch _x000D_ Package Includes: _x000D_ 8 Pieces Roller Skating Wheels Spacers _x000D_ Note: _x000D_ Color maybe slightly different due to different monitor. The above size is measured by hand, please allow slightly difference. Thanks ! _x000D_