Spolector 4pcs Bike Bicycle Wheel Spoke Reflectors Intensive hexagonal wheel reflector of improved visibility with safety at night and during bad weather conditions. This is reflective in the direct light irradiation such as car headlight and gives a security warning to car driver as like a light reflective Traffic Sign Boards and Highway Sign Boards. [IMPORTANT] This is not reflective under the normal street lamp, and coudn't luminous if you ride in the dark without light. Easy to install. Solid secure mounting, Easy to remove. 8cm meter long bicycle spoke reflector, Fits all standard spoked (1.8 - 2.0mm diameter) Material: PP, LDPE, High intensity reflective film. Manufactured in South Korea. Perfectly balanced and visible from all directions.