Please care about the material of the bicycle hanger is the aluminium alloy!Please make sure the hanger fits your bike well before place order ! ! !We strongly recommend you visually confirm your hanger choice with your existing hanger!Compatible with for the following bikes,but only for your suggestion,we donot responsible for the size of bicycle hanger if donot fit your bike frame!Bicycle hanger for:LOOK Rear Derailleur Hanger #00013038LOOK 979 / 977 --2016LOOK 979 / 977 --2017LOOK 979 / 977 --2018Package Contents:1PC biycle part1or 1PC biycle part2or 1PC biycle part3or 1PC biycle part4or 1set( part3+part4)or 1set bicycle hanger(part1+part2+part3+part4)with Bolts(The blots are the gifts,we send them in radom colors and sizes. We donot accept any dispute only about the blots,If you need to specify the size and color, please buy separately.