supply of top seal n type roll size - 8* x 20 mtrs for securing hood of electric loco.as per following specification: (i) visual tape free wrinkle & visual defect. (ii) dimension: (a) width: 8 inch. (b) length: 20 mtrs. (c) thickness: 0-18-0.30mm. (iv) tansile strength kg (25-30 minimum). (v) elongation (%) : 5 minimum. (vi) adhesive to steel (g/2.5cm): 3000mini. (vii) water permeability: not more than two drops after two hours. (viii) weather resistance to pass 200 hrs as per saej1900 in std xenon arc base should pass the test. (ix) oil resistance should pass the test. (x) alkali resistance should pass the test. (xi) mvpt as per ind/me/790 (a) the moisture absorption should not be more than 200 g/m square/24hrs at 40 degree c.