... Weight: 65gFeatures of HD25:Bicycle light Aluminum Mount instructions:* the top side adapt 25mm diameter body light such as P408N, KR08, KR09 ... , M12,M8, M9 , BL09 , BL10, BL12. * Loose the top side screw by tooling and inset the light through the small ... mount: Loose the nut screw down of another bigger hole side , it can be easy to mount on the bar , use ...