This product is either discontinued or we cannot get that from suppliers.
Supermicro 731i-000NBP, Supports for maximum motherboard sizes of 9.6" x 9.6", Dual Intel and AMD processors, Black, Expansion Slots 4 full-height & full-length expansion slot(s).
Supermicro SuperChassis 731i-000NBP Mini-Tower Chassis - 300W PSU, Black