Lenovo ThinkSystem ST550 Front Mid Fan Module – 4x2.5" ODD Conversion Kit (7XH7A06781)

You've got a ThinkSystem ST550 and you need the front mid fan module for the 4x2.5-inch ODD conversion. This is the exact Lenovo part, not a generic cross-fit. Drop it into the front mid position and your cooling config matches the 4x2.5" layout it was designed for. Part number 7XH7A06781, straight from Lenovo ISG

• Front mid fan module purpose-built for the ThinkSystem ST550
• Designed for the 4x2.5-inch ODD conversion configuration
• Genuine Lenovo ISG part number 7XH7A06781
• Direct replacement for the ST550 front mid fan position