【New, Unused】MHW-3BOMBER JUSBEAN Filter Basket 18g Excerpt from the manufacturer's website: The JusBean filter basket is designed for coffee lovers seeking precision, uniformity, and excellent extraction. 1800 ultra-fine filter holes are arranged in uniform concentric circles, achieving high extraction efficiency and producing richer, more balanced espresso. 1800 Precision Filter Holes: Ultra-fine holes allow for optimal water flow and uniform extraction, bringing out the depth and complexity of the flavor. Evenly Placed Concentric Circle Design: Improves espresso quality by evenly distributing water and suppressing channeling. Straight Wall & Flat Bottom Construction: Allows for stable and uniform contact between coffee grounds and water, achieving consistent extraction. High-Quality AISI 304 Stainless Steel: Durable, corrosion-resistant, and uses safe food-contact materials. Easy to Handle with a Non-Fluted Design: Compatible with tampers and distributors, allowing for accurate preparation. Compatible with 58mm Portafilters: Fits standard commercial espresso machines (approximately 58.5mm diameter).