DescriptionAdopted with aviation aluminum alloy, which is with high strength, impact resistance, and pressure, durable and lasting for use.With sand blasting surface treatment machining process to embody a matte texture and quality, sweat-proof and dirt-proof. Allows you to screw wide-angle lens on telephoto lens. Perfect camera accessories for close shot. Use these step up and rings to take better pictures!Features-Color: Black. - Material: Aluminum. - Size: 8.2 x 8.2 x 0.4cm. - Adopted with aviation aluminum alloy, which is with high strength, impact resistance, and pressure, durable and lasting for use. - With sand blasting surface treatment machining process to embody a matte texture and quality, sweat-proof and dirt-proof. - Allows you to screw wide-angle lens on telephoto lens. Perfect camera accessories for close shot. - Lightweight and portable, easy to install, it can also improve the problem of partial vignetting. - Suitable for Canon, Nikon, and other DSLR cameras. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!