La Pavoni Piston in Brass no-stop-parts/no-stop-group Espresso Parts suggests consulting a

Espresso Parts suggests consulting a professional technician anytime your equipment is in need of maintenance

copper gas gasket

so this isn't a piece you can substitute with straight stock tubing

Fits: Select Astoria

La Pavoni Piston in Brass no-stop-parts/no-stop-group Espresso Parts suggests consulting aLa Pavoni Piston Brass This brass piston is the current production version, replacing the previously available Ryton plastic piston. Dimensions have remained unchanged since at least 1974, and it features two slots for the piston lip gaskets. SPECIFICATIONS Dimensions: 43 mm diameter x 23 mm tall Thread: M10 Material: Brass COMPATIBILITY Fits: La Pavoni lever machines using this M10 piston configuration INSTALLATION Recommended for a qualified