It is a standard head size, but I don't remember which it is off the top of my head. I use to have a different head on it they was able to swap between the two so it wasn't a problem.
@@tylerbeasley311 its for the center post. If they made a long leg that would nice. You remove the head, then attach this post then install the head onto the extension. You can get different length ones. You can utilize it as a monopod as well