FITTOO Bike Single Speed Freewheel, 16Teeth, 18Teeth, 20Teeth, Bicycle Single Speed Freewheel 16T/18T/20T Cassette 

• [Classic Products] This FITTOO freewheel is the classic single speed freewheel in brown color.
• [Screwed Type] This freewheel is the screwed-on type for threaded bike rear hub.
• [Durable] FITTOO single speed freewheel is made of high-strengthened carbon steel material, with numerical machines controlled carburizing and quenching production procedures. It is durable for long time.
• [Easy To Install] The FITTOO single speed freewheel can be installed to your bike hub without any stress.
• [Widely Compatibility】 FITTOO 16T/18T/20T freewheels are compatible with most one speed bikes, including vintage bike, recreation bike, kids bike etc.