The Cokin Z-pro adapter rings are made of black anodized aluminum for anti-reflection and durability. Available in 49mm through 96mm sizes you have the option of suiting a wide range of lenses. 
Simply screw the adapter onto the front of your lens, attach the holder and start shooting with your Cokin filters. 

For use with the following holders: 
BZE01 - EVO Z-pro (L) Series EVO Holder  
BZ100A - Standard Z-pro (L) Series Creative System Holder
HOL01NXS - NX Filter Holder