speaker part T-yoke T126X7-34.5X22 Black with special inner hole Outer diameter for basis:from 28MM--230MM thickness of basis:from 10MM---150MM Pole diameter:from from 13.3MM--120MM Height of pole:from 10MM---300MM One body or two body both are OK coating:colorful Zn,blue/white Zn,3+ Cr,black Ni,these can change according to customer design for the special requirement,we can do it according to the drawing