Feature 1 Adopts high quality metal materials, lightweight, sturdy and durable. 2 Can decreases the lens focal length for close-up shot and won't alter the image quality. 3 3 rings/set, 13mm, 21mm, 31mm, can be used independently or in combination to get different magnification. 4 Fits tightly onto cameras, copper conducts inside support auto focusing and TTL metering. 5 Good accessory for photography lovers, a good substitution to expensive macro lenses for macro photography.Features: Adopts high quality metal materials, lightweight, sturdy and durable. Can decreases the lens focal length for close-up shot and won't alter the image quality. 3 rings/set, 13mm, 21mm, 31mm, can be used independently or in combination to get different magnification. Fits tightly onto cameras, copper conducts inside support auto focusing and TTL metering. Good accessory for photography lovers, a good substitution to expensive macro lenses for macro photography. Specification: Material: Plastic+Metal Color: Black Magnification: Adjustable (13mm&21mm&31mm) Suitable for Canon EF/EF-S Lens Size(H*D/3pcs in total): Approx. 8*6.5 cm / 3.15*2.6in Weight: Approx. 274g Package List: 1 x Lens Adapter Rings Set 1 x Manual