Promaster Spectrum 7 Extension Tube Set for Canon EF  type_Resin Coated Interior dimensions are approximately 12x25x25cm

Interior dimensions are approximately 12x25x25cm

but excellent

with minor cosmetic surface wear: not like new

Has clean optics and good mechanical function

which is used on Sony's current Alpha series cameras (and some earlier ones)

Promaster Spectrum 7 Extension Tube Set for Canon EF &nbsptype_Resin Coated Interior dimensions are approximately 12x25x25cmA set of three extension tubes for Canon EF mount: 12mm, 20mm, and 36mm. These tubes have the electronic contacts necessary to maintain autofocus and autoexposure capabilities. If you're curious about dabbling in macro work, this is an inexpensive way to get started. Compatible with EF and EF S lenses.