Sunon MagLev HA40201V4-0000-C99 40x20mm-3pin with speed Sensor 4700RPM 5.5cfm * Only 12dBA * Super Silence! New - Retail 1-Year Warranty Sunon HA40201V4-0000-C99 Sunon MagLev HA40201V4-0000-C99 40x20mm-3pin with speed Sensor 4700RPM 5.5cfm * Only 12dBA * Super Silence!