If your a DIY'er and do your own elec. splicing look at this item ..... 3mm, 2:1 shrink ratio X 4.5 m for $ 3.99 @ Amazon ... ASIN # B098YFN4Z9 ..... This is the most common size for our type of wiring, which means you don't have to buy a lot of sizes you won't be likely to ever use ..... Mike