Key Features:Chrome steel 6805 bearings.,Fully CNC machined external cups.,Co-moulded bearing shields.,Wave washer spacers included.,BSA threading: 1.37" x 24T.,Fits 68/73mm wide brackets.,Fits 24mm spindle cranksets.,Cup tool: 16-notch 44mm OD (BTL-27L).,Made of: 7075 T6 aluminium..