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. Features and Specifications Ridgeless & Flat Bottom: Espresso basket is ridgeless, with flat bottom. Fits Most E61 58mm Group Head Machines: including: 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, and more. For 58mm Portafilters and 58.5mm Tampers Size: Edge to edge ø 70 mm. Internal: ø 60 mm. Number of holes: 585 holes in BIG BANG pattern (BB). Incremental distance between holes from 1.5 mm to increase till the edge. Material: Stainless steel Food Safe Made in Italy