1.we have passed the qulification of ISO9001:2000 as tire valve safety qulification. 2.High reliability ,stability and safety. 1.We have passed the qulification of ISO9001:2000 as the product safety qualification.2.High quality copper , as our source material, also we can use green cooper to produce more safe valve for baby carrier .3.Fine quality Rubber material.4.Special tyre valve are supplied ...