bids are invited for supply, testing, packing, safe delivery and warranty of neoprene rubber bellows with flange and alum supply, testing, packing, safe delivery and warranty of neoprene rubber bellows with flange and aluminium flange rings for coupling of 21kv power supply system busduct with power transformer. the dimension shall be as follows, diameter of the bellow (od) 1000mm, overall diameter including flange 1120mm, height of the bellow 250mm, thickness 82mm. aluminium flange rings shall have 10mm thickness and 50mm width. other requirements shall meet as per the technical specifications and drawing. category not available on gem for the text string uploaded by the buyer relevant neoprene rubber sheet total quantity : 12