List of products and services 01.อุปกรณ์ป้องกันไฟฟ้ากระชาก SPD SPD for Power Supply IEC, Class I SPD for Power Supply IEC, Class II SPD for Power Supply IEC, Class III SPD for communication equipment SPD for LAN SPD for co-axial connectors 02.เซรามิค อะเรสเตอร์ (Gas Discharge Tube) 2-electrode GDT 3-electrode GDT Surface Mount Types GDT High Voltage Types GDT Coaxial Types GDT 03.Earthing Related Products SAN-EARTH SAN-MAT BIO SAN-EARTH 04.Lightning Observation Products Observation Product 05.Obstruction Light Aviation obstacle lights 06.Optical Network System Optical Network System