This espresso tamp base (piston) is 57mm. The tamper base is made of stainless steel and features a convex or curved packing surface. The top of the tamper base is done in Black Flame Graphic laser etching. Fits all handles manufactured by Espressoparts.com.
 "(3057SC_FLAME) Espresso Tamper Base (Piston) 57mm Convex/Curved with Flame Graphics - fits Espresso Parts' Tampers")
