MATERIAL: Polystyrene lens & ABS base TYPE: Road safety indicator light set with 2 batteries (Excluded) SIZE: Lens: 18 cm COLORS: Yellow/Amber WEIGHT: 531 g FEATURES: �7_ standard amber lens,with advanced optics for increased visibility Tamper-proof switch requires pin for activation,increasing security Optional �on at dusk,off at dawn�photo cell extend battery life With Bright LED UV Stabilized High Impact PE Case 18cm Optical Amber Poly carbonate Flashing Panel Automatic Internal Photocell Activation With Manual Key