52mm is La Pavoni's spec for its current-production lever machines — the stated 'filter holder internal diameter (with filter)'. Third-party tampers and baskets for these levers are commonly marketed as 51mm or 51.5mm. Neither 58mm nor 54mm parts fit, and vintage (pre-millennium) La Pavoni levers use a smaller format again.
New to portafilter sizing? See espresso portafilter sizes explained for how 52mm compares to the other standards and why parts don’t interchange across sizes.
No parts in this size yet.