1. Good quality. 2. Delivery on time 3. Professional team Hollow porcelain insulator ANSI Class TR-205 TR-208 TR-210 TR-214 TR-216Creepage Distance, mm 394 610 940 1092 1892Cantilever Strength, kN 8.9 8.9 8.9 8.9 6.7Torsion Strength, N-m 791 904 1130 1356 1695Compreesion Strength,N-m 44.5 44.5 66.7 66.7 111Tensie Strength, kN 38 44.5 53 62 71 Hollow porcelain insulator