Portafilter Spring. Sits just inside your portfilter and holds your filter basket in place. These little bits of wire hold the basket inside the portafilter. In a sense, we owe our ability to even make espresso to these 0.80p bits of metal: think of them like the ‘O’ ring on a space shuttle solid rocket booster. Small, inexpensive… but if one breaks at the wrong time, well Houston, we have a *major* problem! Always add a few of these bad boys to your order, just in case!
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