Tender For corrigendum : supply of e4953153 for insulating mats for lara singrauli hindalco projects : : -e4953153 insulating mat 01-sg4930177880-insulating mat as per is-12652 class-b suitable for 11 kv system 2. 5 mm thick 1x2 sq. meter piece as per sg12985 item-01 , 02-sg4930177898-insulating mat as per is-12652 class-c suitable for 33kv system 3 mm thick 1x4 sq. meter piece as per sg12985 item-02 , 03not to quote , 04-not to quote , 05-not to quote