... 4)Before delivery, all the items will be strictly tested for its working pressure, leakage, surface finishing and thread test.5) High quality ... produced by digital CNC machines, then the quality and precision can be ensured accordingly. 8) ... is 0.01%.Economically priced,exquisitely made.Adequate supply capacity,punctual delivery time.Best after sales ... receive the defective item. brass 4-way connector