1,suitable holder:GU E27 MR16 LED 2,certificate:CE.GS 3,stainless steel,4mm thickness 4,tempered ... use,to recess in the floor or ground,for use with main-voltage halogen lamp1.inner body: die-cast aluminium,Polyester ... powder-coaled with high anti-corrosion2.recess box:thermoplastic material3.outer frame:stainless ...