- Precision Pressure Regulation : Upgrade your classic espresso machine with the 3-piece OPV spring set featuring 6.5, 8, and 9 bar options. This replacement for the factory-set relief valve enables accurate pressure control, ensuring optimal espresso extraction. - Ideal Extraction Pressure : The factory default pressure of 15 bar can be excessive for traditional espresso portafilter baskets. These replacement springs allow you to maintain a perfect 9 bar pressure, which is widely recognized as the ideal setting for maximum flavor extraction. - Versatile Spring Options : This set includes springs with 6.5, 8, and 9 bar settings, giving you the freedom to experiment with different brewing profiles. Tailor your espresso extraction to match your taste preferences effortlessly. - Broad Compatibility : Made from durable stainless steel, these self-assembly springs are designed to fit all newer models of classic coffee machines, specifically those manufactured from 2019 onward. Enjoy straightforward installation while enhancing your machine's pressure control. - Practical Applications : - Perfect for home baristas looking to refine their espresso shots for a richer flavor. - Ideal for coffee enthusiasts experimenting with various brewing techniques and pressure levels. - Great for cafes aiming to offer customized coffee experiences tailored to customer preferences. Enhance your espresso experience with this OPV spring set, crafted for performance, reliability, and ease of use.