Product Jet SkiPiston Back 12110-98E51 Piston-0.5 For Tiger Shark 640 Item Number: 12110-98E51 Description: Piston-0.5 You May Also Be Interested In 13001-3720-04 Piston-1.0 For Kawasaki 900 13001-3714-01 Piston-0.25 For Kawasaki 650 09-8051 Piston Kit For Polaris 7HU-11631-00