Use this Estella 348PSMSCAP23 starting capacitor to replace a broken or missing part on your spiral mixer. This starting capacitor is a direct replacement for the one that came standard on your unit. Replace a broken or missing part to keep your unit operating safely and efficiently. If you notice a problem with your unit's starting capacitor, use this replacement to restore the spiral mixer to working order. It's compatible with Estella SM20 and SM30 two-speed spiral dough mixers.