1. Material: 304 stainless steel
2. Use: crank pedal gasket, tighten the pedals, prevent thread wear to eliminate the noise
3. Increase the pedal washer, the thread force will be dispersed to the surface of the washer, to avoid premature wear of the crank / pedal threads
4. The material is strong and durable, not easy to corrode and rust
5. Specifications: outer diameter of about 20mm, inner diameter of about 14mm, thickness of about 0.5mm
6. Weight: about 0.6g/pc