This is a high-quality, 1-piece replacement rotor designed specifically for select Baer Brake systems. It's slot-drilled and zinc-plated, ensuring durability and performance. Just a heads up, these rotors are directional, which means they're tailored for either the left or right side of your vehicle. If you're unsure about which rotor you need, feel free to reach out to our friendly sales team for guidance. Each rotor is sold individually, and here are the specs: 12.440" X .477", 5 x 5.0" BC, 2.840" Register, 1-Piece, Left, Slot Drilled & Zinc-Plated Finish.