part 9.853-788.0 Spacer piston Ø18 Hawk code 9.853-788.0 Details Hawk number9.853-788.0 DescriptionSpacer piston Ø18 ItalianDISTANZIATORE PISTONE Ø18Qty per pump1 Fits these pumps Hawk NHDP 150 4 NHDP1815LNHDP1815RNHDP2115LNHDP2115R