1.good performance 20 inch steel wheels 2. steel, alloy, chromed, Galvanized 3. good quality& price 4. TUV and Dot standard ... to ISO/TS16949 certificates, USA DOT certificate1.steel, alloy material, chromed, Galvanized2.Size:13x4,13x4.5,13x5,14x5,14x5.5,14x6 ...