I purchased this on February 21st from Map Camera Rakuten store, but I've decided not to use it due to compatibility issues with my existing equipment, so I'm selling it. The purchase price was ¥4,950 including shipping. The actual item is as shown in the fourth photo. This is an adapter for using L39 (screw) mount lenses on Leica M (bayonet) mount cameras. - Brand: Light lens lab - Model name: L-39-M - Compatible mount: Leica M mount - Compatible lenses: L39 mount lenses - Material: Brass (chrome-plated finish) - Size: Approximately φ51mm x H8mm - Weight: Approximately 12g Thank you for looking.