... 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, Disk type and all kinds of ceramic insulators use on transformer, fuse cutout ... blue, brownAccording to IEC, GB, ANSI, BS, JIS, AS,DIN. Ceramic/ Porcelain Insulator 56-series, pin insulator