I was going through some of my equipment and found some o-rings I had stored away. I have some white over-sized rings for the lid of a corny keg. When I compare the white ones to the standard black rings I have, I noticed that the white ones are more bendable and flexible and the black ones are more rigid / stiff.
I cannot remember where or when I bought them, so, does anyone here know the difference? Is one type better than the other? Thanks.