Outlet diameter:Outer diameter(100mm),Inner diameter(80mm). Water-saving technology ,Dual flush fitting with 3/6L. Slow down seat cover:PP material, hommization design , is not easy broken , high temperature resistance corrosion ;Water tank fittings:ABS water fitting , sturdy and durable. Product surface 1280℃ high temperature firing , high-density ceramic glaze , super neat, smooth, bright,white,can be effective anti-bacterial action Water absorption: Porcelain water absorption efficiency control in 0.2% , well above international standards , the product against cracking , odor better. Eeging design:designed by milling, toilet is installed more stable and effective , preventing itself from leakage.