The 58mm portafilter is the commercial standard, used across professional and prosumer machines from La Marzocco, Rancilio, Lelit, Gaggia and many others. Baskets, tampers and accessories built to this standard are broadly interchangeable — though basket depth and body shape still vary, so check the individual entries below for sourced fitment details.
New to portafilter sizing? See espresso portafilter sizes explained for how 58mm compares to the other standards and why parts don’t interchange across sizes.