It will fit only Tamron Adaptall lenses with interchangeable mounts. It is genuine Tamron made adapter, made in Japan. 

I would rate it at 8 for the looks and 10 for performance on a scale of 10. 

Ring has been used, but it is very clean. It shows light wear from use. Ring is in good condition, no major damage.   

Shipping is free within USA and $7 worldwide via USPS first class mail.  You can choose faster and more expensive shipping method during check out process.