Specifications: Material: Stainless steel Size (DIA): 180mm Opposite Hole Distance: 44mm Thickness: 1.8mm Features: For Universal, Mountain Bike, Road Racing Bike. Perfect flatness and incredibly smooth. Wonderful brake performance. Easy to install Package includes: 2 x 180mm Bicycle Brake Rotor 12 x Mounting Bolts Notes: Please check the size before purchase.