Intellitron AA-3915 RF Isolator rattle

I just received the Intellitron AA-3915 RF Isolator, I’ve unboxed it and when I rotate it 180 degress something rattle inside the cylinder. Is this normal or has something broken in shipping?

@Roger_Branton The brand manager has explained that the rattling noise inside the Isolator are the ferrite beads. This is not a defect in product and does not affect operation by any means.