... more than 10 years 4.cheaper price 5.honest Material plastic Working Temperature 0 to 60 degree centigrade Working Pressure 0 ... of material available: such as copper, carbon steel, stainless steel, plastic ect .6) Surface Treatment: galvanized, anodized ,nickel-plated,ect .7 ... work team .8) Engaged in this line since 1995. commonly used black plastic three directions union fittings