The M-Rack Magnet PUK has been beautifully designed to complement your aquarium look by being as low profile as possible, yet remain highly functional. Manufactured by experts in sealing electronics, the whole M-Rack concept was developed for a need to make better magnet accessories for aquariums, that won’t leak, will last a very long time and can be re-used rather than thrown away when you need something bigger, smaller or just different