1.Flapper flush valve with two pieces toilets

2.2-11.5NPSM thread is applicable to the φ62--φ65 flush valve hole

3..ABS material .resist corrosion and deformation

4..Overflow pipe is available to optional height 

5..The stainless steel chain length is optional 

6..Plastic+Rubber flapper ,Rubber flapper and PVC flapper is optional .It is free of leakage

7..Approved by Universal Plumbing Code