External face is naturally anodized aluminium and the body is made from weathertight nylon.
The moving part has an internal and external EDPM seal to provide weatherseal.
The letter plate is sprung so will always return to closed position.
Are as standard installed in a 150mm glazing bar.
It can be installed in the bottom rail when in combination with the 15mm threshold only. Please be aware that installation in the bottom rail does not comply with the Royal Mail requirements.
Not an option for SBD compliant doors.