Standard 58mm portafilter baskets typically only use 48mm of surface area of the entire basket. The Unibasket doesn't leave any flavor in the puck, allowing for a full 58mm end-to-end extraction with a single, thick piece of stainless steel with a robust thickness of 1.2mm. This construction enhances the stability of the coffee puck during extraction, helping to minimize common issues like puck cracking and channeling. The Unibasket fits perfectly with the BUCK portafilter. PLEASE CHECK COMPATIBILITY IN THE DETAILS SECTION