This is for 1 brand new piston kit for your PWC. Supplied is (1) 79.87mm Pro-X piston with rings, clips and wrist pin. These piston works great in the factory nikasil plated cylinder as well as iron cylinder liners. Pro-X pistons are a direct factory replacement piston. You won't get a better deal on OEM style pistons. I also have 79.88mm pistons available.