Bike Derailleur Hanger Frame Gear Tail Hook Universal Rear Derailleur Bike Gear Fixed Gear Hanger 2.53"x1.66" Size and M10 Diameter of Thread and 0.39" ApertureProducts description:Our bike rear tail hanger is made of high quality aluminium alloy, durable and can used for a long time. Good texture, smooth surface and practical. With screw, easy to ..