Please care about the Blots,use the M3 or M4 Blot!!!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:FIT FOR Norco #959371-8-7，Use M3 blot;Norco Search C - 2015-2016Norco Search Carbon - 2017Norco Tactic Carbon Disc - 2017Norco Tactic SL Disc - 2016Norco Threshold C - 2015Norco Threshold C 105/Rival/SL Force/SL ULT - 2016Norco Threshold Carbon - 2017FIT FOR Norco Derailleur Hanger Norco #913005-001,Use M4 blotSearch XR Carbon - 2018 2019+Threshold Alloy - 2018+Threshold Carbon - 2018+Package Contents:1pc Bicycle gear hanger 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.