La Marzocco Portafilter Spring L113LM. Used to secure the portafilter baskets into the body. If your basket is no longer staying securely in your portafilter it's probably time for some spring cleaning! Replace the portafilter spring to secure a tight basket fit and avoid issues with baskets getting stuck inside the machine grouphead. This La Marzocco Portafilter spring will work on all La Marzocco portafilters and other 58mm portafilters.