●Material: ABS and PC material. ●Size: diameter 8.4 cm, thickness 0.7 cm. ●Electronic sign certification: 02-IA E9-22382 certification mark. ●High brightness reflective: reflective markings at night are a great eye-catcher and increase driving safety. ●Easy to install: screw fixed. Includes 6 x round reflectors, 6 x screws.