part 3660250 Piston guide Ø 20 Annovi Reverberi code 3660250 Details Annovi Reverberi number3660250 DescriptionPiston guide Ø 20 ItalianGuida pistone anteriore Ø 20Qty per pump3 Also comes in KIT 42851 Plunger guide kit, Ø20 mm Fits these pumps Annovi Reverberi RTX 1 RTX 30.300 N