Lens ring has been used, but it looks and works good. It has minor scratches from use. I don't see any dents. Threads are not damaged. It works good. Not sure what brand it is, it says made in Japan.
Thread size is 44.5mm (lower and upper threads) , for both rings (you get two rings). Upper retaining ring is double threaded .
Shipping is free within USA and $10 worldwide.