The wide body low pitch blades of the sp120 fans combined with the custom housing provides outstanding static pressure and airflow through heatsinks or radiators the wide body low pitch blades of the sp120 fans combined with the custom housing provides outstanding static pressure and airflow through heatsinks or radiators with rubberized corners a quiet and reliable advanced hydraulic bearing and an included step down resistor for even quieter operation the sp120 truly is the strong silent type