supply of synthetic rubber nitrile bonded cork com [synthetic rubber nitrile bonded cork composition sheet grade rc70-a type c fine granules size 900 mm +/- 15 mm x 600 mm +/- 10 mm x 4.8 mm thick conforming to is 4253 (part 2): 2008 amendment no. 1 october 2010. the sheets shall be duly st ed with manufacturer s name & date of manufacture in indelible ink and suitably packed in transparent polythene bags duly sprinkled with chalk powder individually.] , synthetic rubber nitrile bonded cork composition sheet grade rc70-a type c fine granules s ze 900 mm +/- 15 mm x 600 mm +/- 10 mm x 4.8 mm thick conforming to is 4253 (part 2): 2008 amendm ent no. 1 october 2010. the sheets shall be duly stamped with manufacturers name & date of manufactur e in indelible ink and suitably packed in transparent polythene bags duly sprinkled with chalk powder indivi dually. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]