The QUBE Gold bearing is the second bearing that we developed using this technology, this bearing uses what we call QUBE 3D SWISS technology which incorporates all we have learned in bearing design. Using our 3D modelling technology we have determined the perfect ball diameter, inner and outer wall diameter, and groove depth to ensure the best roller skating bearing on the market. Stronger steel is used here as well allowing a deeper groove to ensure less friction and a faster roll. A hard anodize process creates an even stronger steel while SSL oil and a double Labyrinth seal combine to make an even cleaner environment for a faster roll. The QUBE 3D SWISS is the fastest rolling bearing in our line and our most tested bearing as well. Pack Contains 16 Bearings.