Zorbes Viltrox DG - C 12MM 20MM 36MM AF Auto Focus Macro Extension Tube Set for Canon Eos Series Camera Descriptions:This extension tube set can help you achieve macro lens while not affect the picture quality because there is no optics inside. The closer the focus, the greater the magnification.It is used between camera body and 35mm single-lens reflex camera. It comes as a set of 3 tubes in different lengths, and you can use them in single ones or in combinations as prefer. The electronic copper pins make it perfect to couple with camera's auto diaphragm, TTL metering.Fit for Canon EOS series camera and DSLR cameraTube diameter: 65mmTube length: 12mm / 20mm / 36mmTube weight: 33g / 39g / 53gMaterial: Metal mount, plastic bodyCompatible camera: For Canon EF / EF-S mount lensNote: Cameras showed in the pictures are not included in the package.  Package weight: 0.210 kg  Product Size(L x W x H): 9.00 x 6.20 x 6.20 cm / 3.54 x 2.44 x 2.44 inches  Package Size(L x W x H): 9.50 x 7.00 x 7.00 cm / 3.74 x 2.76 x 2.76 inches  Package Contents: 1 x Viltrox DG - C 12MM 20MM 36MM AF Macro Extension Tube Set, 1 x English and Chinese User Manual