HPE 874567-B21 Ml350 Gen10 4lff N Drive Cage Kit, Device: Storage drive cage, Hard Drive Form Factor Compatibility: 3.5", Bays: 4 3.5" LFF, Pricing Type: Field installation, Designed For: HPE ProLiant ML350 Gen10 (3.5"), ML350 Gen10 Base (3.5"), ML350 Gen10 Entry (3.5"), ML350 Gen10 Performance (3.5"), ML350 Gen10 Solution (3.5"), ML350 Gen10 Sub-Entry (3.5"). Ensure that the drives inside a desktop, server or rack mount computer have firm mounting points with the HPE 4 LFF Non Hot Plug Drive Cage Kit.