This is a new set of 16 current production viton valve stem seals for the Triumph Daytona 600/650 '04-'06. Superior viton construction containing 5% Teflon for reduced friction and wear. Viton has far better resistance to high temperatures and petroleum distillates and will maintain their elasticity for many years. These are the best on the planet, satisfaction guaranteed or your money back. Please contact me if you have any questions. Thanks for looking!