Magflap MK2 in black colour - Magnetic letterbox draught excluder High quality, easy to fit and proven to work! Reduces cost of bills, by preventing heatloss through letterboxes Unlike other draught excluders, Magflap's magnetic closing doesn't let the heat out or the cold in..Magflap is possibly one of the highest aperture(70mm) letterbox draught excluders on the market today which really helps with that larger post for online shopping these are so simple to fit and incredibly effective at sealing your letterbox whilst allowing post to arrive easily these do not need brushes and can be fitted both internally and externally these are manufactured by ourselves using our tooling in the UK and design packaging and components all from the UK keeping jobs here and cutting down air miles !!