Joan Bicycle Chainring Sprockets Cranksets Guard Protector 48T 120mm 4 Bolts , Bike Chainstay Protector Size:48Teeth 4 Bolts 120mm(4.72 inch) ,adjacent hole distance 120mm(4.72 inch) as picture 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 Material:Engineering plastics Prevents chain from jumping to the outside Qty: 1 x Chain guard protector +4 bolts