Question: What are some ideas for tagging/labeling a chain?

I am working on a project that will label the chains on a hoist. There are about 20 chains. What I envision is some sort of plastic or rubber sleeve with a clear cover that I can slide over the chain, and then slide a paper label inside with information about the chain and what it is aloud to lift. 

Has anyone come across any unique or efficient labeling ideas for chains? My main concern is I want something that won't get tangled up as some of the chains are close together. 

I would probably color code a link or two, and use a color chart.  The method would entirely depend on the size of the chain though.