I bought this off of A-mart and it turns out it is too big for my scope even if I add felt. Once I saw it around my scope I knew that it wouldn't work. It is felt-lined and never used according to the original owner. It looks new to me and I never used it. I will trade for a clamshell tube ring similar to this one or a pair of hinged tube rings that measure 100 - 105mm in diameter. I will also sell it for $35 shipped.