The be quiet! HDD Cage allows almost all be quiet!- cases to be upgraded with an extra HDD cage. One cage can hold a 3.5\"- and two 2.5\" drives. Thanks to rubber dampeners in black and orange, the transfer of drive vibrations into the rest of the case is effectively prevented. Technical Details: Dimensions: 158 x 108 x 31 mm (H x W x D)Capacity: 1x 3.5\" / 2x 2.5\"Compatibility: Dark Base 900, Dark Base 700, Silent Base 801, Silent Base 601, Pure Base 600Bundle:HHD Cage incl. 3x thumb screws4x Orange dampeners4x Black dampeners4x Screws