1Made of high strength alloy material, high strength, good stability and durability. 2The o-ring design can effectively prevent water from entering the five-way and can be used as a buffer belt for frame and BB. 3Smooth ball bearing axis, greatly improving abrasion resistance and not easy to rust. 4Separating gasket, double side slide, not increase resistance to bearing, high lubrication. 5This is a great bicycle DIY accessory with long service life.Condition: 100% Brand New Item Type: Bottom Bracket Material: Alloy Optional Type: for Mountain Bicycle, for Road Bicycle Color: BlackBicycle Frame: For 68 x 73mm / 2.68 x 2.87in, 34.798mm / 1.37 in x 24 TPI Frame ShellSuitable for Bicycle Frame:Tool: Approx. 44mm / 1.7in, 16-notch1 x Bike Bottom Bracket1 x Gasket