... valve stem seals for cummins engine , material is viton , color is blackWe are a manufacturer in specilize in rubber and teflon seals. ... are oil seals and valve stem seals. we have more than 200 types of valve seals for various Engine .Such as TOYOTA ... ,NISSAN,SUZUKI ,FIAT , VOLKSWAGEN ,MISTUBHI,HONDA,DAEWOO,CUMMINS,FORD and others cars and Trucks.Material ...