Lens ring has been used, but it looks and works good.  It has minor scratches from use. I don't see any dents. It works good. 

Holder has 20.5mm OD lower threads and 24mm ID threads (for series IV filter upper ring). Please note that upper retaining ring is double threaded. Please note that adapter will be mailed as pictured.  

Shipping is free within USA and $10  worldwide.