Detailed Product Description 1.Sandblast coupling2.Type:Male female3.Size:4/3''-2''4.Material:PP,Brass,Iron 5.Material of gasket:EDPM,FKM,Which has withstand exterme temperature from -40-250 degree,what is more it can aginest abrassion.6.Compared with other couplings, the price r very competitive, but it can also function well.