1. Material: aluminum alloy
2. Application: suitable for all kinds of photographic equipment conversion adapter use
3. Uniform force, clear and accurate threads, not easy to slip in the process of use
4. Smooth plane, surface metal luster, solid and beautiful
5. Aluminum alloy material, not easy to rust and corrode
6. Specifications: 3/8 female to 5/8-27 male
7. Diameter: about 18mm
8. Weight: about 4.6g/pc