【Simple Preheating for Best Taste】For superior brewing results, cover with the included black lid, preheat with hot water, then remove the lid easily. (Note: Air pump is not included.) 【Versatile 58mm Brewing Setup】Perfect for home baristas and outdoor coffee lovers, this pneumatic espresso machine comes with a 58mm powder bowl, acrylic shelf, extension tube, and machine body—all you need for barista-level brews anywhere. 【Copper Pressure Relief Valve】High-quality copper valve efficiently releases residual gas, preventing pressure buildup and ensuring consistent, optimal performance with each espresso pull. 【Tool-Free Bowl Replacement】Innovative circlip design for the powder bowl holder enables quick, effortless swapping of 58mm bowls, streamlining your brewing process without extra tools. 【18-24g Optimal Powder Capacity】Precisely engineered for the included 58mm bowl, it holds 18-24 grams of coffee powder—ideal for extracting rich, balanced flavor tailored to this machine.