part 3720620 Piston guide Annovi Reverberi code 3720620 Details Annovi Reverberi number3720620 DescriptionPiston guide ItalianGuida pistoneQty per pump1 Fits these pumps Annovi Reverberi RQV 1 RQV 2.5 G30 D Annovi Reverberi RQW 1 RQW 2.5 G28 D