Imi Tamiya 95563 HG Lightweight 17mm Aluminum Ball-Race Rollers (Ringless)

★These are lightweight versions of the popular 17mm aluminum ball-race rollers, with 520 ball bearings built in for superior smoothness of rotation. 

★The product includes two rollers, plus screws and spacers for use in attachment. 

★These components are around 25% lighter than the base design.