If you want to install a water cooling system in the Dan Case A4-SFX, you need this A4-SFX-120-AIO-Bracket . You can place a 120 mm radiator on it. When installing, however, it must be noted that an AiO with its internal SFX power supply limits the length of the graphics card to the ITX format. The bracket with radiator is then mounted next to the graphics card. If you ship the power supply outside the case, you can install a full-size GPU in addition to the AiO. The bracket is then attached next to the motherboard. Technical details:- Dimensions (W x H x D): approx. 180 x 20 x 120 mm- Material: Aluminium (1.5 mm)- Colour: Black- Compatibility: Dan Case A4-SFX