Our new Standard Line 110MM Wheels are available with 2 types of Cores, the X6 and the 6M model, Anodized Black with Black, White, Blue, Yellow, Orange, Purple or Red PU. The Cores are made out of Certified 6061 aluminum extrusion and machined to shape. Of Course Hand poured in Holland.according to our own proprietary formulas. In this case: 86 shore A