... a best quotation.A, What is the working pressure ( Mpa, Bar, PSI)?B, What is the volume flow ( m3/min, CFM)?3, What is the Power supply ( KW, ... require model quantity or ask us other question you need to know4), Send you the invoice5), Wait for your deposit6), ... add to the cost for the consumers; meanwhile, the time cost and the loss caused by returning will far exceed the value of the product itself ...