Issue with Shockers?

My set just came in the mail today and i noticed something strange.

When shaken, the smallest bell rattles like the diaphragm is loose or something is fccked. I also notice i can blow some air through it with my mouth.

The other bells do not do this.

Is this normal or is the bell itself messed up?

That sounds like the diaphragm may be loose please contact hornblasters at 1-877-209-8179 for a warranty exchange.

BAM! now thats service!

I got it guys, thanks.
the set screw was backed all the way out.