I have for sale a pair (2) vintage Savage 12 ga to 410 ga shotgun barrel adapters. They are in great shape. They are 12" long. They come with I think to be the factory carry case. I would say the chamber is 3". I'm asking $250.00 for both adapters. This is a nice pair to have for hunting or help teach our new young shooters. I can send pic's if you want them.