Description: Model: 24T tooth freewheel for bike Function: mainly used to refit your bike Strong affordability and flexible rotation Easy to install and dismantle Idea for recreational vehicle,children carriages,electric motor car,ect. Specification: Color: Copper Material: Metal Outside diameter: 101mm/3.97 inch Thickness: 16.5mm/0.64 inch Internal thread: about 34 ± 0.05mm Whether it can be rotated reversely: No Package Includes: 1 x Bicycle 24T Tooth Freewheel Sprocket Gear