I have a fairly new, (purchased in August) authentic BON4M (small cage) with solid rings for sale. This was our first venture with a metal device and my wife simply prefers me in my CB3000. It comes with everything you see here. The smallest of the rings is only 40mm; (I tried to widen it a tad with my dremmel tool, then rebuffed the surface). The only ring actually worn was the 44m ring. Selling for $100 plus whatever it costs me to ship it to you.