The surface wall mounted, door hold-open electro-magnet, is housed in a white fire resistant ABS plastic casing. Type tested to meet EN1155, knockouts for surface or back cable entry and a spring loaded pin to give zero residual holding force when de-energised. · · · Surface mounted design · · Fire resistant ABS plastic casing · · Operating Voltage 24V DC · · 20kg Holding Force (200N) · · Zero Residual Force · · Approved to EN1155 and CE Marked · · Supplied with adjustable keeper plate · · An integral manual release button, allowing the door to be closed without operating the fire alarm · · Metal enclosures · · Easily mountable