The NiteRider Lumina Micro 650 bike front light delivers 650 lumens of high brightness and a wide beam of light with its powerful CREE LED and special lens. So you can ride safely even on unlit roads. General characteristics:Material: Dupont glass fibre reinforced nylon Weight: 130 g Compatibility: Bicycle handlebars from 25.4 to 35 mm in diameter Locking mode.