Tenders for Supply of Nitrile Bonded Rubber Cork Sheet Type Rc 70C Very Good Oil Resistance For Main Transformer Th Ickness 3Mm Of Size 900X600mm To Is Specn 4253/Part Ii -1980Reaffirmed 1999 Edition 2.31993-11. Warr Anty Period: 30 Months After The Date Of Delivery