3.pay attention to the temperation range and pressure range .
advantage: 1.new oil cap to ensure the oil will not come out .
                      2.new adjust pressure cap   ( when pressure high will not come out)
                      3. bigger flow rate and less noise .
production ability : 1. one month 10000pcs
                                     2. 150 workers
                                    3 .advanced machine ,professional technician team  
                                    4.     4.delivery date :normally 15-20days .