ITEM NAME:2x Bike Disc Brake Rotor MTB Floating Front Rear Rotors Fixed Gear Brakes Description: Made from premium aluminium alloy inside and stainless steel outside, high strength and ultra-light Excellent heat dissipation to reducing heat transferring and solve the problem of internal stress Pattern: 6 bolt, Center Distance: 44mm. Thickness: 1.9mm Excellent wet/dry performance, and easy to mount on Suitable for Road Bike,BMX, MTB, Folding Bicycle, Especially Mountian Bikes Specification: Material: Stainless Steel Diameter: approx. 160mm/6.3 inch; Package Includes: 2 Pieces Bike Disc Brake Rotor 12 Pieces Disc Bolts Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks! DMO0009630319496221.2 Pieces Bike Disc Brake Rotor. Pattern: 6 bolt, Center Distance: 44mm. Thickness: 1.9mm. 12 Pieces Disc Bolts. Material: Stainless Steel. Made from premium aluminium alloy inside and stainless steel outside, high strength and ultra-light.