Rubber sealed to prevent the ingress dirt and water. Easy to fit, undo the allen key bolts, remove wheel, push out the old bearings and replace with the new ones, simply push in. Fits Front and Rear Wheels on all MICRO Scooters, including Mini Micro, Maxi Micro, Micro Sprite, Micro Bullet, Y Glider, JD Bug, Stunt & Crisp.
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