Material Type:Aluminum Origin:Mainland China 52.4mm YX125 engine piston kit for China YX 125cc 153FMI engine Apollo Small MX 125 YCF Pit Dirt Bike Specification: Made by professional manufacturer with quality assurance. Reliable performance, simple installation. Condition: 100% Brand New Material: Aluminium Alloy Size: 52.4mm Package Includes : As Per Select Fitment: Fit For China YX 125cc 153FMI engine Apollo Small MX 125 YCF Pit Dirt Bike Please Note: 1inch=2.45cm/1cm0.393inch. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please check the size and appearance of the product before you take the ordering to ensure that it is suitable for your Motorcycle. If you aren't sure whether the item fit your motorcycle or not, please come to us freely