CUI Devices CFM-40 40mm x 40mm DC Axial Fans are offered with dual ball-bearing construction or an omniCOOL™ system for maximum reliability. The series offers a tachometer signal option and multiple speed options for different cooling needs. The rated speeds range from 3500RPM to 20,000RPM while the airflow ranges from 4.22CFM up to 24.38CFM. The CFM-40 series is RoHS and REACH compliant and has an operating temperature range of -10°C to +70°C. CUI Devices CFM-40 40mm x 40mm DC Axial Fans are an ideal thermal management solution for IT and telecommunications equipment, medical devices, and industrial applications.