I have never used this heatshrink before so i dont have a clue where to start with the sizes etc i assume you have to get one bigger then the macro line diameter as its shrinks. Sorry if this sounds dumb i just dont have a clue.just google it, have a look at pc modding forums, the UV red is more of a deep pink, failing all of that and you really want to do it, get some pink fablon sheet cover your hose then use clear heatshrink