Design: Do Not Alter Switch Symbol Sign Symbol Type: Prohibition Red and White Colours Safety Signs Dimensions: Please see table below for available dimensions Our prohibition symbol signs are complaint to regulations BS EN ISO 7010. Prohibition Symbol Signs Application: Suitable for internal and external use. High quality external grade materials are used when manufacturing all safety signs with a minimum lifetime of 5 - 7 years. UV Resistant Symbol Signs: Colours do not fade over a period of 5 - 7 years. Scratch Resistant Material Orientation: Square Product Code: PRS031 Can not find the safety signs you are looking for? Contact us with your requirements and we will be happy to help.