Magnet Mount support system makes mounting of the pump quick and easy allowing the pump to be secured virtually anywhere in the aquarium. MM50 is for glass thickness up to 1/4in (7mm). M100 is for glass thickness up to 3/8in (10mm) MM200 is for glass thickness up to 1/2in (12mm). 160° directional discharge enables the pump to be directed and secured at different angles. Prop impeller creates high water volume output with low pressure making the pump energy efficient with low heat emissions. cord length 180cm