9-speed Freewheel with High precision ensures close connection with the bike hub and smooth operation MTB Freewheel is Made of high tensile steel and made by the technology of quench-temper hardening, and Has higher strength, fine durability and extreme resistance to abrasion 9-speed Cassette has the function of Easily control the shift with special design exclusively for mountain bike MTB Cassette with strong antioxidation makes it hard to rust, can provide long service life Bicycle Cassette Adopts the hollow design and has chrome plating surface, no fading Colour: gloden Product Includes: 1pc Size: 15.5x15.5x6cm Notes: Due to manual measurement, please allow 1-3cm error, please make sure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual colour of the item.