You should know about it right ? It's areso head, nothing to it. Except it looks cool in shiny jet black and gives your floor tom a nice "oomph"... I use my 18" floor tom as mini-bass drum. I cut a port hole in it and it gives me the resonance and depth I needed. However it can't be too lose. Evans (d'addario product in general) are extremely reliable and precise. This is a great buy and I would recommend it.