The 9914 is a high pressure core. The 0578 is a high pressure inflating connector.
Schrader - 057840099 referenced product produced by high technology. You can ask all the codes and references except 057840099 too. It distinguishes with price and quality among the similar products. It produced result of tests of laborotory for years. Contact us if you are looking for alternative price of 057840099 .
