Features ·3 extension tubes: 9mm 16mm 30mm ·Exceptionally useful for macro photography ·All-metal body provides maximum durability ·No optical component in between (it ensures not to downgrade your photo quality.) ·The more tubes you add, the closer the focus and the greater the magnification Notice ·There are no electrical contacts in the extension tubes. Exposure has to be adjusted manually. ·Aperture control is not available if you use a lens which does not allow you to manually adjust the aperture (without an aperture ring) Compatible ·All Pentax Mount Cameras Such as: K-5, K-r, K-x, K-7, K-m etc. Package Include ·Brand new Macro Extension Tube For Pentax x1