Duncan released their official MOD spacer system so you could take some of your favorite Duncan yo-yos and MOD them for wider string trick or offstring play!

Now the new "Large Bearing" Mod Spacers now come with an Concave bearing to take your Mod Spacers to the next level! (Bearing is officially licensed by Dif-E-Yo who holds the patent on the design)!

Concave BEARING MOD SPACERS AVAILABLE HERE!