Essence Single-lever basin mixer 1/2" M-Size single hole installation metal lever GROHE SilkMove 28 mm ceramic cartridge with temperature limiter GROHE StarLight chrome finish GROHE EcoJoy mousseur 5.7 l/min GROHE AquaGuide adjustable mousseur GROHE QuickFix Plus installation system swivel spout with mousseur and stop limiter retractable chain flexible connection hoses