ITEM NAME:2Pcs Bike Disc Brake Rotor 6 Description: High quality 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, Mountain Bike, BMX, MTB and etc. Specification: Material: Stainless Steel, Aluminium Alloy Thickness: Approx.1.9mm / 0.07inch Centre Opposite Hole Distance: approx. 44mm / 1.7inch Diameter: Approx. 160mm/ 6.3 inch Package Includes: 2 Piece Bike Disc Brake Rotor SKU: FUZ0016832619485286.2 Piece Bike Disc Brake Rotor. Pattern: 6 bolt, Center Distance: 44mm. Thickness: 1.9mm. SKU: FUZ0016832619485286. Excellent heat dissipation to reducing heat transferring and solve the problem of internal stress.