Conversion kit (adapter ring)
 
For retrofitting an existing Caliheat fan holder to the 50 ° Nord bayonet system.
The ring is simply attached to the existing fan holder.
Your fan is already compatible with the bayonet lock of the sleeping board.

INFO: Your existing fan holder can also be used without the bayonet on the sleeping board. However, the fan can be aligned and operated much better with a bayonet.