1.Our TR418 schrader valves / American valve stem are 100% leak tested.
2. Our main products Zn alloy with 10% brass TR418.Brass TR418 should with more than 55% brass,can't more light than zinc alloy.
3.We specialize in tire valves field for 20 years, with the strength of TR418.
4.Our TR418 is very popular in market of Southeast Asia,Eastern Europe,South America,Middle East,Africa for many years.You can rest assured purchase.