tender for set of insulating ring inner & outer, one number each [part of sub kit 3 iohas per annexure r4 and sub kit 3 poh as per annexure s4] of n 32 tap changer. m/s replpt. no. s1218-1 & s1219-1, m/s ae pt. no. g1218-1 & g1219-1 or rdso drg. no. skel-4661 alt. 1.