- 400 KV POLYMER SUSPENSION INSULATOR. - BRAND/MANUFACTURER: ISOELECTRIC. - MODEL: ISOL-TS-Z-SB120-2900-2GR. - NUMBER OF SKIRTS: 73 (37 SKIRTS WITH A DIAMETER OF 145 MM; AND 36 SKIRTS WITH A DIAMETER OF 110 MM). - INSULATOR LENGTH: 2.9 METERS. - WEIGHT OF EACH INSULATOR: 11 KG.