Grass Trimmer Spool Cover Get your grass trimmer back in working order with the help of this replacement spool cover. This is a genuine Bosch spare part to make sure your spool and line are well protected from damp and rust. Over time spool lines degrade, so prolong this from happening and get yourself a spare cover. The spool cover simply fits onto the end spool with minimal effort, you will keep your trimmer line and spool protected when in use. You will soon have your trimmer ready for tidying your up your garden once again with the help of eSpares. Please check the suitable model fit list to ensure that this is the correct part for your appliance.