Dear China Lutong,My name is Dardan Dine and I have had e-mail communication from your company regarding the following products: - Valve F00RJ01941 and - Nozzle DLLA142P1709.We are looking to place an order of 500 valves and nozzles as listed above.However, we have not had a response from you.Looking forward to hear from you.Kind regards,Dardan Dine