If you disassemble engine parts where there is a gasket in between you MUST ALWAYS replace the gasket.
This set contains all the gaskets and retaining rings you need when disassembling and reassembling the cylinder of the 50cc Euro4 or Euro5 iGet engine from Piaggio/Vespa.
And let's face it, for the few cents we charge for such a set you're not going to be fooling around.