1,Bicycle Bar Mount HD25 2,Bar Size:28 to 32mm 3,Hole Diameter for the Flashlight:25mm 4,Weight:65g 5,Used for Bike Light Model: Bicycle Bar Mount FEREI | HD25Specifications of HD25:Bar size: 28 to 32 mmHole diameter for the flashlight: 25mm 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 , ...