I had purchased a 1" tube scope mount and it came with one 30mm tube ring. I was going to send it back to opticsplanet but i had to pay shipping and most likely have to wait maybe several weeks for a new set. So i e-mailed DNZ products and they sent me a new 1" tube ring that same day i sent the e-mail and got it in two days.. They did not require proof of purchase, just a simple e-mail. I have this scope mount on several of my rifles and love them.
Pros: Easy Set up, Comes with tool, Great customer service
This review was written in the old system and had content requirements that are different than reviews written today.