Fit for: / Razor MX350 MX400 ZR350 SX350 Dirt Bike/ / Razor 24V Pocket Mod (Chrissy, Sweet Pea, Blossom, Vapor, Miniature Euro, Daisy, Kiki, Bella, Betty) Scooter/ / Razor Rambler 12 Mini Bike/ / Razor PR200 Pocket Rocket Bike/ Universal 90mm rear band drum brake assembly compatible with most of kids electric scooter e-bike e-scooter. Brake Size: Length: 18cm/7.09 inch, Width: 11cm/4.33 inch. Rotor Size: Outer Diameter: 90mm/3.54 inch, Inner Diameter: 34mm/1.34 inch. Package: 90mm Band Drum Brake Assembly x 1. Please check the description to confirm the compatibility before purchase. Fit for: / Razor MX350 MX400 ZR350 SX350 Dirt Bike/ / Razor 24V Pocket Mod (Chrissy, Sweet Pea, Blossom, Vapor, Miniature Euro, Daisy, Kiki, Bella, Betty) Scooter/ / Razor Rambler 12 Mini Bike/ / Razor PR200 Pocket Rocket Bike/