part 3820340 Piston Annovi Reverberi code 3820340 Details Annovi Reverberi number3820340 DescriptionPiston ItalianPistone superioreQty per pump1 Fits these pumps Annovi Reverberi RPV 1 RPV 2 G 19 D Annovi Reverberi RPW 1 RPW 2 G 19 D