First come, first served. This was a gift. It seems to be for Micro Four Thirds and Nikon. I don't know the details, so I hope someone who needs it will use it. The following is an explanation by AI: A metal mount adapter for connecting Nikon lenses to Micro Four Thirds cameras. - Model Name: Nikon-m4/3 - Type: Mount Adapter - Features: Metal, durable - Compatibility: For Nikon lenses - Connection Type: Micro Four Thirds Thank you for looking.