Features: brand new and high quity CHAINRING-Narrow Wide Offset 3mm Chainring For MTB bike GP 1 9 O 01 N G 1 GP11 CNC 7075 Crankset Chainwheel Parts. The Versatility of the Chainring, Stop dropped chains, instl simply. CNC high speed engraving and milling hard oidation treatment , In order to let you enjoy the ride, it is for ide to choose the quity CNC machining integrated, intensity is great, appply for long for time cycling. Etended edition plus or minus tooth shape, the chain can effect better Chainring is made of premium loy structure, lightweight but sturdy. with positive and negative (The positive tooth corresponding chian tooth width; tooth corresponding negative chain is narow ), designed to prevent the chain from dropping The chainring made of premium materis can maintain a smooth surface, bright colors, fade, and corrosion resistance. It is easier to clean than tradition chainring and will make your more beautiful overl Unique inclination angle, unique shape, unique mud discharge oblique mouth, unique weight reduction treatment. Specifications: Materi: 7075-T6 Aviation uminum loy Thickness: Disc 7mm; Positive Tooth 3.6mm, Negative Tooth 2.0mm Number Of : 30T 32T 34T 36T 38T 40T Process: Cnc High-speed Milling + Hard Oidation Treatment Compatible: Speed Lian Middle Lock GP Crank 8~12 Speed Chain Note: Please low 0-1cm error due to manu measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actu color of the item. Thank you! Package includes: 1 Chainring.