K7 Single-lever sink mixer 1/2" two hole installation SpeedClean professional spray GROHE SilkMove® 35mm ceramic cartridge GROHE StarLight® chrome finish metal lever lever mountable left- or right-hand side adjustable flow rate limiter swivel spout swivel area 140° diverter: mousseur/shower jet automatic return to mousseur flexible connection hoses rapid installation system protected against backflow