1. Porcelain/ ceramic insulator 2. pin insulator 3. IEC, GB, ANSI, BS, JIS, AS,DIN standard 4. brown or grey Porcelain/ ceramic insulatorPin type insulator, post type ... glaze of insulator available color of white, gray, blue, brownAccording to IEC, GB, ANSI, BS, JIS, AS,DIN. Ceramic/ Porcelain Insulator 56-series, pin insulator