'EMERGENCY STOP' labels Printed plastic label with yellow background and black text. For use with Harmony® 30 mm emergency stop buttons. Diameter: 90 mm. Schneider Electric Style 9 Harmony ® Metal 30mm Range A selection of Harmony Style 9 chromium plated metal control and signalling units designed for use in the most extreme environments. Enhanced oil, dust and water tight-ingress protection IP66/ NEMA 4/4X Extremely robust - suitable for harsh environments Maximum panel thickness 6mm Fast installation - one screw contact block fixing and automatic earthing Screw clamp terminal finger protected contact blocks / lampholders to IP2X Superbright LED technology - 100000 hour life and resistant to the effects of vibration