EACHSHOT&reg; Silver Metal Mount Auto Focus AF Macro Extension Tube/Ring for Kenko Canon EF-S Lens T5i T4i T3i T2i 100D 60D 70D 550D 600D 6D 7D Color: Silver This extension tube 13mm tube (Tube 1) 21mm tube (Tube 2) 31mm tube (Tube 3)