GOOFIT Rear Brake Assembly Master Cylinder Caliper for SDG SSR 107 110 125 I BK12 Rear brake assembly. This rear brake assembly should fit most Chinese made pit bikes.not for SSR150 One week money back guaranteed if not satisfied Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)