This product is the replacement Hotend fan. It is ONLY compatible with the MK3/S/+. The MK2.5/S Rambo requires the v-cable adapter, the fan can NOT be connected to the MK2.5/S Rambo directly.
Package include:
To replace your Hotend fan Noctua please consult the assembly manual: https://help.prusa3d.com/guide/5-e-axis-assembly_169235#283161