Precision Competition Filter Basket screen Flat bottom, stainless steel Suitable for 51 mm, 54 mm, and 58 mm tampers and bottomless portafilters Product details 51 mm: width 59 mm, height 24 mm, weight 23 g 54 mm: width 62 mm, height 24 mm, weight 25 g 58 mm: width 68 mm, height 22 mm, weight 26 g Key benefits Delivers precise, consistent extraction with a flat bottom design Durable stainless steel construction stands up to daily use Versatile compatibility with 51/54/58 mm tampers and bottomless portafilters Use scenarios Competition or cafe dialin across multiple portafilter sizes (51/54/58 mm) Bottomless portafilter testing to observe pour, detect channeling, and refine grind and tamping Quick size swaps on machines supporting 51/54/58 mm configurations for different beans or roasts Performance and compatibility highlights Designed for reliable performance with accurate dimensions for each size Built to accommodate common 51/54/58 mm setups without compromising fit or flow