Full Details from Amazon.com : http://www.amazon.com/gp/product/B003J45568?tag=onigi-20

Supermicro 200-Watt Mini 1U Rackmount Server Chassis Black CSE-510L-200B

Compact 1U Server Appliance Chassis
200W Low Noise Power Supply
1x 35 Internal Drive Bay
OR Up to 4x 25 Internal Drive Bays OR 1x Full-height Half-length PCI Expansion Slot OptionalOptional
OR up to 2x 25 with single retention bracket and 1x FH HL PCi