The LUCCA Flow Control Device is designed to give baristas more precise and responsive control over espresso extraction on compatible E61 machines. By allowing direct adjustment of water flow at the group head, it makes it easier to experiment with different pressure and flow profiles to highlight sweetness, clarity, body, and other characteristics in the coffee. Unlike many flow control kits that use chrome-plated brass components, the LUCCA Flow Control Device is constructed from stainless steel for improved durability, long-term reliability, and consistent performance. Its intuitive design makes manual profiling easier to learn while still offering the flexibility experienced users need for more advanced extraction techniques. Compatible with E61 espresso machines, including models such as the ECM Synchronika and LUCCA M58, this add-on allows you to adjust flow and pressure at the group head across a range of approximately 0 to 10 bar. This gives you greater control over pre-infusion, peak pressure, and declining-pressure profiles for a more customized espresso experience.