This is a new set of current production viton valve stem seals for the Suzuki LT-400 Eiger 2WD '02-'03, LT-A400 Eiger Auto 4WD '02-up, LT-F400 Eiger 4WD/2WD, LT-Z400 Quadsport '04-up.. Viton has the highest temperature threshold and resistance to chemicals compared to all other seal materials and are offered here at a fraction of OEM cost. Also containing 5% Teflon for reduced friction and wear. These are the best on the planet, satisfaction guaranteed or your money back. Please contact me if you have any questions. Thanks for looking!