A stainless steel base compatible with Concept Art/JoeFrex handles:
The "knock" bases have a rubber ring around them in case you like to knock the portafilter using your tamper. The knock base costs an additional $5.00
Different espresso machines require different base sizes. Please make sure to select the correct size as Concept Art Bases are not returnable. If you need assistance in choosing the right base contact our sales department.
Currently no warranty information for this product. Please contact us for more information.