Product Jet SkiPiston Back 290-887-060 Piston-0.5 For Seadoo 657 Item Number: 290-887-060 Description: Piston-0.5 You May Also Be Interested In 290-887-670 Piston-0.25 For Seadoo 720 13001-3731 Piston-0.75 For Kawasaki Ultra 900 09-710267 Gasket Set For Arctic Cat 09-711200 Full Set Gasket W/ Oil Seals For Yamaha