Feature: 1. Compatible for NIKON AI, and M42 mount camera body. 2. The lens mount adapter is suitable for AI mount lens to mount for M42 Mount camera body, increase the lens range of application. 3. Aluminum alloy material, precision technology, strong, durable, corrosion-resistant. 4. Easy to install, flexible to use, compact size and portable. 5. The workmanship is very delicate, tightly and smoothly combined with the mount. 6. Manually set the aperture control of the lens. Specification: Condition: 100% Brand New Item Type: Lens Adapter RingModel: AI-M42 Material: aluminium alloy Color: black Weight: Approx. 33g Compatible Lens: For NIKON AI Lens Compatible Camera: For M42 mount camera . Package List: 1 x Lens Adapter Ring