●CNC ALLOY CORE 88A PU WHEEL-High-quality wheels made of CNC machined aluminum and strong high-rebound 88A PU(Polyurethane Material). ●ONE PAIR WHEEL WITH BEARINGS -Package includes 2 scooter wheels and complete with our fast rolling and high precision ABEC-9 Bearings. ●SIZE 100X24MM FIT ON MOST SCOOTERS-The diameter of the scooter wheel is 100mm(3.9inch) and the width 24mm(0.94inch). The wheels therefore fit on most stunt and freestyle scooters. ●SIMPLE INSTALL,USING ON MANY PLACES-Wheels are the most important part of every coaching stunt / freestyle scooter. Our 100mm scooter wheel is ideal for using on parks and paved roads. Simply install, drive off,spin faster, holding up well. ●100% SERVICE - We will afford helps for quality issue within our guaranteed date 6 months Were always willing to listen to your concerns! So please do not hesitate for a moment to contact us .