MK Masterseal has been replaced with Masterseal Plus: See Link Below MK Masterseal Plus
Sentry MCB detect overcurrents due to both overload and fault currents. The MCB will operate and interrupt the supply to prevent damage to the installation. A range of enclosures for Masterseal grid accessories specifically designed for use outdoors or in areas heavily exposed to dust and/or splashing water. Constructed from extremely robust polycarbonate, the range is sealed to IP56 against dust, water and is impact resistant. Masterseal is easy to install and the large rocker switches and clip in modules make it easy to use, even when wearing heavy gloves.