60mm Mushrroom Head Emergency Stop Pushbuttons The RMQ-Titan emergency stop pushbuttons are available as palm switches with a diameter of 60mm. These pushbuttons are available as a twist release, key release, illuminated with standard LED or with mechanical switch position display in the centre of the actuation element. Tamper proof in compliance with EN ISO 13850 IP67/IP69 rated Standards IEC/EN60204 Approvals UL, CSA Eaton RMQ Titan 45 & 60 mm Range