part 3660430 Sealing system Ø 20 Annovi Reverberi code 3660430 Details Annovi Reverberi number3660430 DescriptionSealing system Ø 20 ItalianSistema di tenuta Ø 20Qty per pump3 Also comes in KIT 42841 Water seal kit, Ø20 mmKIT 43763 Water seal kit, Ø20 mm Fits these pumps Annovi Reverberi RTX 2 RTX 30.300 NRTX 30.500 N