This kit is designed to mount a high airflow quiet fan in the place of the stock fan compatible with Sega Dreamcast console.It is specifically built compatible with Noctua NF-A4x10 5V fan. This mod shines in systems with GDROM emulators like the USB-GDROM and the GDEMU.It makes those systems nearly silent.It may not do much to systems with the old disk drive still installed as the disk drive is louder than the cooling fan.Notice: This kit is NOT compatible with Dreamcast early revision known as VA0, these systems are fairly rare in all regions except Japan. The easiest way to determine if you have this model is to open the system, if you have a silver or grey fan attached to a metal heatsink, it is a VA0.color:BlackMaterial:plasticPackage Contents:1 set x Cooling RadiatorOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.