supply of supply of a set of solid core porcelain insulators with 1050mm cd for 25kv, ac, 50 hz,supply of a set of solid core porcelain insulators with 1050mm cd for 25kv, ac, 50 hz,,supply of a set of solid core porcelain insulators with 1050mm cd for 25kv, ac, 50 hz, single pha se overhead traction lines confirming to rdso spec no. ti/spc/ohe/ ins/0071 (04/2022) or latest, str: ti/s tr/010 rev-01 or latest. set consists of 2 items. (i). porcelain stay arm insulator of ri : 6000-2 - 1 no. (ii). porc elain bracket insulator of ri : 6030-1 - 1 no. make: core approved vendors only [ warranty period: 30 month s after the date of delivery ] ]