'A Class Fire Door (self closing)' sign is a 150mm x 150mm general photoluminescent sign made from flexible photoluminescent board making it visible even in complete darkness. All our signs conform to the BS EN ISO 7010 regulation, ensuring that all graphical safety symbols are consistent and compliant. All our photoluminescent signs are made from a P.S.P.A Class B material and tested to DIN 67510 Part 1 - 4 for afterglow performance, which exceeds international standard for flammability, smoke and toxicity.