Mounts on top of a BD shells, to accept two 7/8in down tube style arms. Photo may show chrome , but item will ship in BLACK. NOTICE: It is very common in our industry for black drum parts to have a wide range of color variation from part to part. Example: Hoops and tube lugs may be lighter black-chrome, where rods,lugs and other parts may be a darker solid black. Please contact us before ordering if you have questions about this.