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 13001-3731 Piston-1.0 For Kawasaki Ultra 900 290-887-300 Piston-STD For Seadoo 787 VG-1094 Complete Gasket Kit For Honda 290-887-060 Piston-STD For Seadoo 657