This brake support fits: Fusion X3

• SUPPORTIVE LINER - Cushioned liner and tongue hold foot securely in place for all four sizes

measure the circumference of your head starting in the middle of your forehead and match it with the sizes below: XS/S 20 – 21

Shield-free design

They are higher

Proto-Full-Knuckle SCS V2 Oversized 4" (Gold) Fasen This brake support fits: FusionThe PROTO Full Knuckle SCS is the original and first Standard Compression System. It fundamentally changed the way a freestyle scooter was built and effectively revolutionized the freestyle scooter after market parts industry. The Full Knuckle SCS is still the strongest and most universally compatible SCS ever created. The Full Knuckle SCS is built to perform and last and carries a lifetime warranty on cracking. Made of High Grade 6061 T6 Aluminum.