... rebound MDI urethane with 6061 alloy core Type: scooter wheel NEW!!! stunt scooter 100mm scooter wheel1)Material:super high rebound MDI urethane with 6061 ... your require4)Color:as request5)packaging:144PCS/cartonOEM service.These Scooter wheels have met all tests and held up well, not ... . Durable, affordable and look good, what more could you want. NEW!!! stunt scooter 100mm scooter wheel