【Size for 22g Coffee Grinds】The height of bastket is 25.5mm. Recommended for dark roast 20g - 22.5g, medium roast 21g - 23g, light roast 21.5g - 24g. 【BIG BANG Pattern】 IMS introduces its newest innovation, featuring a BIG BANG pattern (BB) with 585 strategically distributed holes. More holes are concentrated towards the center, mimicking and guiding the espresso flow. This design enhances water distribution, a crucial factor for achieving a consistently even extraction, while also minimizing channeling, a common challenge in espresso brewing. 【Fit for 58mm Portafilters】It fits most 58mm Portafilters and 58.5mm tampers. 【Fits E61 Group Head】It fits most E61 Group Head Portafilters. Compatible with Ascaso, Astoria, Bezzera, Bfc, Bianchi, Brasilia, Brugnetti, Conti, DID Orchestrale, ECM, Elektra, Expobar, Faema, Faema – E61, Fiorenzato, Fracino, Grimac, Kees Van Der Westen, La Marzocco, La Nuova Era, La Pavoni, La Scala, Londinium, Magister, Nuova Simonelli, Promac, Quality espresso, Rancilio, Rocket, Royal First, SAB, Sanremo, Slayer, SV, Synesso, VFA, Vibiemme, Victoria Arduino, Wega The IMS Big Bang Espresso Filter Basket is designed to revolutionize the coffee extraction process, promising a more consistent and flavorful cup of espresso. The design features and materials used in this filter basket aim to address common issues faced by espresso enthusiasts, such as uneven extraction and channeling. IMS introduces its newest innovation, featuring a BIG BANG pattern (BB) with 585 strategically distributed holes. More holes are concentrated towards the center, mimicking and guiding the espresso flow. This design enhances water distribution, a crucial factor for achieving a consistently even extraction, while also minimizing channeling, a common challenge in espresso brewing.