High-voltage line pin insulators are mainly used for insulation and supporting wires in high-voltage overhead transmission lines. According to the rated voltage, it is divided into five grades of 6 10 15 20 35KV. The needle insulator is made of porcelain cement and steel feet (or screw sleeves) with Portland cement glue. The surface of the porcelain is white or brown, and the surface of the steel is hot-dip galvanized. Model Description P-Ordinary pin insulator PQ-reinforced heavy-duty pin insulator PQ1-reinforced neutral needle insulator PQ3-Lightning-resistant pin insulator