... Overflow pipe heigh could be adjustable Detailed product Description1.Dual flush valve2.1.5'',2''3.For one piece or two ... by moving up and down8,OEM is welcome DescriptionWire-control dual flush valveItemKB201MaterialABS,POM,PPStructureone piece, two pieceTypeBottom fillingAdvantageBig adjustment for ... professional service8,Free samples for design and quality check Wire-control dual flush Valve