... .38mm & 16mm optional * Big overflow pipe Wire activated dual flush toilet valve-- KB201• Full & half flush; • Dual push button Dia.38mm and Dia.16mm for ... and down( half/full window)• Flush outlet Dia. 2" for 1-pc toilet or 2-pc toilet• Silicon seal is free from leak ... ,CSA,CE,SASO, NF, AS, WRAS, CE, NOM Wire activated dual flush mechanism