Feature:1. Scope of Application: Wide range of applications, suitable for road bikes and mountain bikes, suitable for most length matching bikes.2. Simple Operation: Can be install and disassembled quickly and effortlessly, no tools are needed, to meet your various need.3. Size Parameters: Length: 140mm/5.5in, hole diameter: 9.5mm/0.4in, please check the inner diameter of your old bottom bracket before purchasing.4. Quality Assurance: Strict quality control standards, good stability and excellent performance, high safety factor, can be used with peace of mind.5. Durable Material: Made of chrome molybdenum steel material, durable and long service life, high strength axes CNC process, surface grinding, smooth.Specification:Item Type: Rear Hollow Shaft Color: As Pictures ShownMaterial: Chrome Molybdenum SteelWeight: Approx.163g/5.7ozLength: Approx. 190mm/7.5in, Hole Diameter: Approx. 9.5mm/0.4in.Package List:1 x Rear Hollow Shaft