part 1942940 Piston guide Ø 22 Annovi Reverberi code 1942940 Details Annovi Reverberi number1942940 DescriptionPiston guide Ø 22 ItalianGuida pistone posteriore Ø 22Qty per pump3 Also comes in KIT 42402 Water seal kit, Ø22 mm Fits these pumps Annovi Reverberi WHW 4 WHW 15.20 NWHW 21.15 NWHW 26.15 NWHW 32.20 N