Hot swap up to four 3.5" SATA or SAS hard drives using three 5.25" bays. This 4-bay 3.5" SATA/SAS backplane, installed into three standard 5.25" front drive bays, makes it easy to swap 3.5" SATA or SAS drives in & out of your server or desktop computer. It features a trayless design that saves you installation time & enables you to insert or remove drives as needed. With its durable plastic & aluminum construction, it provides a cost-effective solution for drive maintenance & interchangeability of data between multiple systems. This 4-bay backplane is ideal for IT professionals, such as system administrators or computer operators, for quickly swapping drives. With support for both SATA & SAS 3.5" drives, it saves valuable time in environments where storage drives need to be replaced or removed regularly, such as in server rooms & data centers. The hot-swap backplane is a cost-effective solution for large deployments of system builds or upgrades, for organizations looking to stretch their IT budget. The protective backplane is engineered with a plastic & aluminum design to safeguard your drives. Two built-in fans & ventilation help to optimize heat dissipation, to help protect your drives. To maximize the speed & performance of your drives, the mobile rack supports SAS I & II & SATA I, II & III, providing data transfer speeds up to 6 Gbps when paired with a compatible controller.