The Moto-Master HALO brake disc has a premium quality stainless steel outer ring that allows for high-performance braking while at the same time extremely durable. - Exact size and positioning of the venting holes ensure equal heat dispersion under high thermal stress while the brake pad contact surface is cleaned evenly. - The laser-cut and precision grinded outer ring is fixed to a billet CNC machined aircraft aluminum carrier which is black anodized and laser marked. - Lightweight stainless steel floaters. - TUV approved.