Features:Compatibility: Compatible with general 30-56mm external or semi-concealed earphones for BB30/86/90/91/92 bottom bracket installation;Size: Bolt length is about 200mm (7.7 inches), base diameter is 50mm (2 inches). Weight: 360g.Labor saving: the interlayer is a bearing ball layer to ensure that the earphone is pressed into the front fork smoothly;Note: For the first time, it is recommended to press into a bowl first, and then press into another bowl after completion. It is recommended to apply grease to the pressed part to facilitate installation, disassembly and maintenanceSpecification:Material: Stainless Steel (plating heat treatment)Weight: about 360g (including packaging)Compatible with most 30-56mm external and semi-hidden wrist sets on the market.Bolt Length: 200mmBase Diameter: 50mmPackage List:1 Set x Bike Bottom Bracket Press ToolNote: 1.Please allow 1-2cm measuring deviation due to manual measurement.2.Due to the different monitor and light effect, the actual color of the item might be slight different from the color shown on the pictures. Please Understand, Thanks!