Product Jet SkiPiston Back 290-886-270 Piston-0.5 For Seadoo 580/587 Item Number: 290-886-270 Description: Piston-0.5 You May Also Be Interested In 12110-98E51 Piston-1.0For Tiger Shark 640 12110-91B03 Piston-STD For Tiger Shark 900 35.7322 Top End Gasket Kit For Beta 09-606-04 Piston Kit For Arctic Cat