The Strad Espresso Maker is an innovative manual lever machine that combines minimalist design with compatibility with the standard E61 group. Precision-crafted using CNC machining techniques, the machine is entirely mechanical, with no electronic components, giving the user complete control over the espresso-making process. KEY FEATURES E61 Portafilter, Shower and Group Gasket compatible 100% manual espresso CNC high precision machining Super resistant, build with solid parts 100% metal body: aluminum and stainless steel Made, assembled and shipped from Europe Simple structure: built with as few parts as possible Elegant, with easy-to-exchange traditional bakelite handle Great capacity: up to 110ml of water for more than 90ml of coffee extraction Ten years warranty!! Fully compatible with Pressensor Includes the column upgrade suggested by Nick's Coffee Studio Your Strad may come with a standard 6.5mm ear filter holder or with a traditional E61 filter holder with 7.2mm thick ears. If your Strad comes with a traditional E61 filter holder, the group gasket will be 8mm thick. However, we include an 8.5mm group gasket in the box in case you want to use an standard model or a different type of filter holder. For E61 Standard Portafilters: Size 58mm Ears 6,5mm Manufactured in Italy or other places Filter basket 16g Finished stainless steel or chromed brass Group Gasket installed: 8.5mm. Handle thread: M10 For E61 Traditional Portafilters: Size 58mm Ears 7,2mm Manufactured in Italy Finished in chromed brass Filter basket 21g or 18g Group Gasket installed: 8mm + 8.5mm in the box Handle thread: M12 Please note that your Strad is compatible with almost any E61 filter holder, just use the group gasket appropriate to the thickness of the ears.