Crafted from resistant brass, this heavy type valves maintains structural integrity under 150°C / 300°F temperatures and 15bar pressure for lasting espresso machine Achieve coffee customization with this adjustable over pressure valves, featuring precisions pressures control to enhances extraction and nuanced flavor from any coffees bean variety Ideal for specialty coffee enthusiasts seeking professional equipment upgrades, suitable for various espresso machine models Perfect for fine tuning morning espresso shots or dialing in pressure sensitive light roasts beans during weekends brewing for home kitchens or compact cafés setups Optimizes extraction consistency through calibrated spring mechanisms that channeling and over extraction, while its universally thread design ensures seamless integration with most coffee machine boilers