Condition: Item Type:Disc Brake Rotor Material:Aluminum alloy bracket + stainless steel outer ring Color:Plating ColorOptional: 140mm/5.5in, 160mm/6.3in, 180mm/7.1in, 203mm/8inThickness: Approx. 1.8mm/0.07in Hole core diameter: Approx. 44mm/1.7in Standard 6-hole installationProcess: Full CNC engraving and milling, electroplating coloring, stamping, corrosion resistance, not easy to rust. .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Stainless steel outer ring, hollow design, strong decontamination and drainage. 2Electroplating process, anti-oxidation, colorful, give you a different riding experience. 3Fine workmanship, high strength, corrosion resistant, not easy to rust. 4Wonderful cycling accessory for mountain bike. 54 different types for you to choose, meet your different needs.