size:all material:brass,bronze,copper,ss easy to install long lifespan strict quality,competitive price,good service 1.Material:Brass,bronze,copper,stainless steel.2.Round and square3.Size:could do it by your own dimension4.High strength corrosion resistance,abrasion resistance,.... prevent backflow, odor, jams, insect.5.Easily install and clean can help keep the stink coming from the pipes 6.We ...