Magnet Rings (Generators): For High Speed

• Compatibility: Only for Volcanic Wheels.
  Predator, Dazzle, Intruder Roller Skate wheels
  Ablaze & RoadStar Skateboard wheels
• Not Compatible with other Brands due to the product spec & dimension.
• For 8mm Axles
• Sold by Pair: $5.00 (2 pcs.)