I just took it out and theres no wrap on it where about do i put it?
You will need to get some tubular shrink wrap, like this:http://www.ebay.co.uk/itm/2-4-50mm-1-3-Ratio-Heat-Shrink-Heatshrink-Tube-Sleeve-Sleeving-Wrap-0-5m-Black-/151046897154?pt=UK_BOI_Electrical_Components_Supplies_ET&var=&hash=item232b18be02
I think the domains have 32mm stanctions so i'd get the 37.5mm diameter tubing. You only need to cover the middle half ofo the spring really so you may need to cut the tubing down to size.