1.Specification:2-11.5NPSM thread is applicable to the φ62--φ65 flush valve hole 2.ABS material .resist corrosion and deformation 3.Overflow pipe is available to optional height 4.The stainless steel chain length is optional 5.Plastic+Rubber flapper ,Rubber flapper and PVC flapper is optional .It is free of leakage 6.Approved by Universal Plumbing Code