1. Our bike cassette is made of quality steel material, resistant to temperatures, corrosion, rust, deformation, wear, with durability, good impact resistance, tooth profile precision, lost tooth design, strong compatibility, making riding more effortless. 2. Ensures smooth acceleration and precise positioning within the gear range. Whether tackling steep climbs or uneven flat roads, this bike cassette delivers efficient power transfer and reliable shifting. 3. The bike freewheel is constructed from nickelplated steel sheet with strength, multilayer galvanization and antirust treatment. 4. The bike freewheel rotates smoothly and quietly. 5. The bike freewheel is made of steel, resistant to temperatures, corrosion, rust, deformation, and wear, featuring durability, impact resistance, precision tooth profile, lost tooth design, and strong compatibility for a smoother ride. 6. This bike freewheel features smooth rotation with minimal noise. 7. The freewheel's gears display clear tooth count markings for a quieter riding experience. 8. Professionally manufactured, directly your old or broken freewheel. accessory for mountain bikes and road bikes. Easy installation, no drivetrain adjustments required.