I went to Lowes and bought a $5.59 length of plastic flexible tubing. Enough to do my API Grand Slam Shooting Star. This works much better than the srink wrap...cheaper to. The tubinb is 5/8 inch inside diameter and 3/4 inch outside diameter. You should remove the plastic inserts that the chain goes into. Put the tubing on the chains..let it set for a day then do the holes and heat the ends a bit