The Rotor is available in 160 mm, 180 mm and 203 mm sizes, as well as black, red, blue, yellow, purple and green. The package includes a rotor and bolts with 6 holes.Mounts easily on disc brake frames and forks and fits most calipers.With Centerline brake rotors, advanced brake materials, including composites of organic resins and metallic materials, provide excellent braking performance.The uniquely designed shock absorption structure reduces the noise and vibration during braking to a minimum.The unique design can effectively dissipate heat and prevent the reduction of braking effect due to overheating. BUCKLOS Bike Rotor: Brand:BUCKLOS Product:Bike Disc Brake Rotor Model:G3CS Material:Stainless Steel Size:160MM/180MM/203MM Color:Black/Red/Blue/Purple/Yellow/Green Weight:160MM:About 94.