part 3660160 Piston Ø 20 Annovi Reverberi code 3660160 Details Annovi Reverberi number3660160 DescriptionPiston Ø 20 ItalianPistone Ø 20Qty per pump3 Also comes in KIT 42836 Plunger kit, Ø20 mm Fits these pumps Annovi Reverberi RTX 2 RTX 30.300 NRTX 30.500 N