Milwaukee Twins Steel Disc Brake Rotor For Harley FL / FX The Milwaukee Twins Steel Disc Brake Rotor, precision-engineered for trueness, enhances braking performance with reliability. Choose between a stainless or zinc finish for a sleek appearance and exceptional durability, making it an ideal direct OEM replacement. Formerly offered under the J&P Cycles brand. Features: Nice replacement for your worn out OEM rotors Precision ground for trueness 10 diameter Replaces OEM 41806-72 B / 41813-79