Ignoring the top end 'rattle' that is indicative of worn camshaft/valve clearance shims can eventually lead to more serious mechanical failure.
Restore full performance and have a nice quiet top end by replacing the worn shims.
The other available sizes listed below:
Have you thought about trying this pro-workshop gasket sealant - 08CRAHLG120G take your engine building to the next level!
Add as many new parts to the same shopping cart as you wish, new valve springs and valve oil seals for example, and still only pay the same fixed price shipping cost.