Super fine filter, universal bowl for high pressure coffee machine, porous fine filter, makes your coffee delicate. Will not rust and is durable, with a thick and durable cup body. Combines 2 styles for a more practical experience, ideal for enjoying your coffee moment. Usage: 1. Pour hot water into the cup, avoiding the relief valve. 2. Add coffee (recommended fine grind) into the cup. Use chopsticks or a coffee spoon to level the grounds. 3. Slightly moisten the filter paper, place it on the upper filter, and screw on the top securely. 4. Tighten the upper chamber by hand to ensure a proper seal. Do not over-tighten using the handle, as this may cause slipping. 5. Heat using a gas lamp or alcohol stove. Pre-warming the base with hot water can improve performance. 6. When coffee begins to drip, reduce to a low flame to prevent rapid extraction. 7. Allow the coffee to brew slowly for optimal flavor. Color: Silver Material: Stainless steel Size: 51mm Package Includes: 1 x 2-Cup Filter Basket 1 x 4-Cup Filter Basket Maintenance: 1. Before first use, clean the funnel with a mixture of white vinegar and water, then dry thoroughly. 2. Avoid impact with sharp objects during use to prevent scratches. 3. After use, wash with a mild neutral or alkaline detergent, dry with a soft cloth, and store in a dry, clean place. 4. Avoid dry burning. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allowance is +/- 1-3 cm.