Bharat corrub industries [bci] is an iso 9001:2000 company, offers different grades of cork sheets. Bci manufactures rubberized cork sheets which are available in standard sizes of 915 mm × 915 mm or 915 mm × 610 mm and thickness varying from 0.8 mm to 20 mm under the brand of `chetak`. Sheets can be supplied as per is 4253 part ii specifications or international specifications as per customer requirement.