The part of camera mount and lens mount are both made of high quality brass, while the tube is made of high quality ABS plastic
Shortens minimum focusing distance of lens for macro photography, convert almost any lens into a macro lens, save your cost of buying an expensive macro lens
Full Autofocus and auto exposure Compatibility
Extension tubes of 12mm and 25mm lengths can be used individually or in any combination for greater magnification
Fits Canon EOS DSLR cameras and EF and EF-S lenses