Stainless steel puck screens to enhance the quality of espresso extraction. Placed between the extraction head and the coffee grounds, they even out the water flow and prevent channeling. They also reduce "spray unevenness" when using a bottomless portafilter, resulting in smooth and stable extraction. Lineup (from left to right) ① BEARR Coffee 2-layer crimped type (0.7mm thick) ・Upper layer: Punched metal ・Lower layer: Fine mesh → Softens the water flow for gentle extraction. Light and clear flavor. ② Premium stainless steel 2-layer welded type (1.1mm thick) ・High rigidity and uniform pressure structure for stable reproduction of rich crema. ・Ideal for straight blends and dark roasts. ③ Professional barista specification 2-layer welded type (0.8mm thick) ・Extremely uniform water flow distribution, preventing channeling. ・High reproducibility of sweetness, clean extraction even with light roasts. ④ Sintered mesh type (1.6mm thick) ・Multiple layers of wire mesh integrated by high-temperature sintering. ・Excellent pressure distribution and durability, achieving a soft and smooth extraction flow. ・For those seeking a flat flavor profile. Main Features • Prevents dirt from adhering to the extraction head, keeping it clean • Uniform water flow suppresses channeling • Reusable (paperless) • Reduces spray unevenness with bottomless portafilters • Improves extraction reproducibility and stabilizes flavor balance Compatible Models • φ51mm portafilter equipped models • Please check the portafilter diameter of your machine. Contents • φ51mm Puck screen × 4-piece set • Material: SUS304 Stainless steel Condition • Left ①: Used for about 1 month • Right ④: Used only once • ② ③: Unused, stored items Overall in very clean condition (please refer to the photos). The actual items in the photos will be sent. No claims and no returns accepted. Also recommended for comparison By testing the differences in extraction based on the crimped/welded/sintered structures with your own machine, you can find the optimal screen.