The fuel tank cap GW0185 is compatible with Harley, it is a screw-in, vented, locking gas cap. There are two different surface finishes, one is normal plating, and the other is ED coating to black. However, they are both made from the same material. To maintain high performance and quality, Guide Win chooses premium materials from Taiwan for production. The outer shell is a chrome-plate, while the inner shell is made of POM, offering both corrosion and wear resistance. If you are looking for Harley fuel tank cap and locking gas cap, please contact us.