Joan 42-44t Bicycle Chainring Sprockets Cranksets Guard Protector,Bike Chainstay Protector Size: Universal for 42-44 teeth crankset , measure clearlly the diameter of the adjacent holes like the picture Prevents chain from jumping to the outside Material:Engineering plastics Qty: 1 x Chain guard protector +8 bolts Before you order it, Please Count the teeth of your bicycle crankset ,Count the crankset holes , and measure the diameter of the adjacent holes .Any doubt , please feel free to contact us , Thanks