Technical specifications:\n\n- Material: Aluminum 6061-T6\n\n- Weight: 289g (10.2 oz) with bearings\n\n- Diameter: 115mm\n\n- Hardness: 88A\n\n- 12 STD (30 mm wide)\n\n- Bearing and spacer included\n\n- Colors: Black / Blue / Red / Neochrome