With dual ball bearings Slip Stream 120 DB is the newest addition to the Slip Stream Series known for extreme quietness and powerful performance in the market. The dual ball bearing technology works by reducing friction and thus less wear and tear. Moreover it is less sensitive to dust. That translates into longer lifespan 10 times more than conventional bearings. Furthermore the principle of small hub and large rotor blades was maintained which leads to a 20 -40% higher airflow compared to fans with a traditional hub. The five different speed versions provide a wide range of applications and guarantee excellent performance at optimum operating temperatures at all times.