Zorbes WEIHE Auto Focus Macro Metal Extension Tube for Canon EF EF - S Lens Description:  Extension tubes, enabling a lens to focus closer than its normal, which magnifies your subjects. Usually, you only need to pay a little money to get a macro photography and maintain the original optical quality.Main Features: - Suit for all Canon EF and EF - S mount lenses.- With 3pcs tubes that are 13mm, 21mm and 31mm adapters, 7 different combination ways.- Gold-plating connectors support autofocus and metering.  Package weight: 0.210 kg  Product Size(L x W x H): 6.50 x 6.50 x 8.00 cm / 2.56 x 2.56 x 3.15 inches  Package Size(L x W x H): 7.50 x 7.50 x 10.00 cm / 2.95 x 2.95 x 3.94 inches  Package Contents: 1 x Extension Tube, 1 x Storage Bag, 1 x English User Manual