... Deg; 2. Stainless steel screws, to fix driver; 3. Exactly fastener, easy for embedded installation; ... Aluminum alloy Water-proof,Anti-UV,Anti-corrosion;Driver with strict & long time test before application; ... packing etc. All with signature of the responsible.Driver Certificates and Patent in Germany, USA,Australia, ... would be expensive?No,very cost effective.Not only lighting,but also art of lighting ...