High voltage areas are inherently dangerous and should be clearly marked as such. This sign is constructed of rigid plastic, and manufactured by Jalite in the UK. Photoluminescent, glow in the dark coating. The solid white background is printed in bold yellow and black. A warning arrow is illustrated inside a triangle. Text reads, “Warning high voltage” Available in two sizes. Choose either 200mm x 150mm or 100mm x 300mm. Mounts to most surfaces easily with any standard adhesive.