The inner diameter of the motorcycle fuel tank cap GW0014 is 30 m/m. It is suitable for many brands of motorcycles, such as Zündapp, SACHS, NSU, HONDA, and VESPA. The upper shell is made of SUS430, which has high hardness and excellent corrosion resistance. Not only is it smooth and shines on the surface, but it also enhances the functionality. Moreover, the upper part comes with a blue protective film, which provides advanced protection effectiveness. If you are looking for the non-locking version, please refer to our part no. GW0717. This motorcycle gas cap cover offers both durability and aesthetic appeal for a wide range of motorcycles.