part 1781530 Piston guide Ø15 Annovi Reverberi code 1781530 Details Annovi Reverberi number1781530 DescriptionPiston guide Ø15 ItalianGuida pistone posteriore Ø15Qty per pump3 Also comes in KIT 42332 Water seal kit, Ø15 mm Fits these pumps Annovi Reverberi XHW 2 XHW 08.15 NXHW 11.17 N