Feature:1. The closeup adapter kit contains adapters with different lengths of 13mm/21mm/31mm, which can be used alone or in combination to obtain the required magnification.2. The product with electronic contacts to support auto focus, auto exposure, etc.3. Metal mount, fine workmanship, high precision, wearresistant and durable, and will not damage the lens and camera.4. It can be matched with the TTL metering and AE mode of the camera body.5. Auto focus, adjustable aperture. After adding close to the circle, the body and the lens are the same linkage.Specification:tem Type: Macro Extension Tube 13mm+21mm+31mmColor: BlackMaterial: Plastic+AlloyFocus Type: AutoWorking Length: Approx. 13+21+31mm/0.5+0.8+1.2inMount: for EF/EF-S MountCompatible Camera: for Canon 5D4/5DsR/5Ds/5S3/5D2/5D/6D/6D2/7D/7D2/10D/20D/20DA/30D/40D/50D/60D/70D/80D/77D/90D/850D/200DII/800D/200D/760D/750D/100D/700D/650D/600D/550D/500D/450D/400D/350D/300D/3000D/1500D/1300D/1200D/1100D/1000D.Package List:1 x 13mm Macro Extension Tube1 x 21mm Macro Extension Tube1 x 31mm Macro Extension Tube1 x Instruction1 x Storage Bag