Our product is made of aluminium alloy, which is lightweight and durable to use. Intensity is more secure, appply for long time cycling. A perfect replacement for bike repair. Features:1. Made of aluminium alloy, which is lightweight and durable to use.2. Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction.3. Compatible for M6000/M7000/ M8000 / M9000 Series Cranks.4. The positive tooth corresponding chian tooth is wide, tooth corresponding negative chain is narrow.5. A perfect replacement for bike repair. Specification:Condition: 100% Brand NewItem Type: ChainringMaterial: Aluminium AlloyBCD: 96 mm / 3.8 inDiameter: 32T: 13.5 cm / 5.3 in, 34T: 14.5 cm / 5.7in, 36T: 15 cm / 5.9 in, 38T: 16 cm / 6.3 inWeight: Approx. 60 - 88 g / 2.1 - 3.1 ozPackage list:1 * Bicycle ChainringNote:Compatible for M6000 20speed tooth tray,not compatible for M6000 30 speed tooth tray.