No filter paper required: eliminates odor and potential paper flavor impact, helping preserve the coffee flavor. Doublelayer filter structure: the filter handle uses a twolayer design that is matched with professional Italian coffee machines to achieve effective filtration and reduce sediment. Material and safety: ABS resin body is tasteless and meets health and safety requirements for pharmaceutical and food industries; provides good oil resistance, a smooth surface, and easy cleaning. Filter construction for flavor and protection: the inner layer is woven from density superfine metal wires to isolate coffee grounds from the brew; the outer layer is a thickened stainless steel plate with laser perforations for added protection and durability. Performance and practicality: durable, reusable, and easy to clean; designed to deliver reliable filtration with minimal waste and straightforward maintenance. Compatibility: designed for use with professional Italian coffee machines. Use scenarios: At home with a professional Italian espresso machine to brew clear, flavorful coffee without paper filters. In a cafe or small office setting using Italianstyle machines to reduce filter waste while maintaining consistent flavor. While traveling or in places where paper filters are unavailable or undesirable, offering convenient filtration and easy cleanup.