Serfas Multi Sport Bicycle Headlight/Taillight Multi Mounting Bracket - Multi-BracketWorks for both front and rear lights 3 sizes allow for belts from over 20mm to 100mm wide Adjusts to fit pneumatic and round seatposts and handlebars For lights up to 120 gramsFeatures of Serfas Multi Sport Bicycle Headlight/Taillight Multi Mounting Bracket - Multi..