Joan Bicycle Chainring Sprockets Cranksets Guard Protector 48t 5 Bolts 100mm, Bike Chainstay Protector Size: 48Teeth 5 Bolts 100mm(3.94 inch) ,adjacent hole distance 100mm(3.94 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 +5 bolts