The Supermicro 2023US-TR4 is a 2U Rack Server with 12x 3.5" SATA Hot-Swap Bays, Redundant Power and Integrated Quad GbE.
The Supermicro 1123US-TR4 is a 1U Rack Server with 10x 2.5" SATA Hot-Swap Bays, Redundant Power and Integrated Quad GbE.
The Supermicro 2028U-TR4T+ Ultra SuperServer is a 2U Rack Server with Redundant Power Supply, 24x 2.5" SATA Hot-Swap Bays and Integrated Quad GbE.