Product PWC / Jet SkiPiston Back 290-887-300 Piston-0.5 For Seadoo 787 Item Number: 290-887-300 Description: Piston-0.5 You May Also Be Interested In 290-887-570 Piston-0.75 For Seadoo 951 13001-3722-02 Piston-0.5 For Kawasaki 750 09-711173 Full Set Gasket W/ Oil Seals For Polaris 3852969 Bushing, Alternator To Bracket For Omc