Aluminium Alloy 2-Mode Red LED Clamp Cycling Bicycle Bike Safety Warning Light - Black (2 x AG10)
Material: Aluminum Alloy - Diameter: 35mm - Emit red light - 2 modes available: constant > strobe mode - Can be used as bike safety light or decorative light - Suitable for seat post diameter: 31.8mm - Powered by 2 x AG10 batteries (included) - Comes with mounting nut