supply of filter bags and cages for esp hoppers to 2x600 mw , rgtpp, khedar , filter bags & cagesfor esp hoppers to 2x600 mw , rgtpp, khedar , filter bag for intermediate surge hopper ( tech. date: size- id-160 mm x 2740 mm lg, material- nomex non woven needle felt-550gm / m2 , type:- collar type, finish: singed and cylindered finish, gas temp:-160º c ) ( as per drawing at annexure-iv ) , cage for bag filter of immediate surge hopper size: dia160x 2725 mm material for cage:-cages made from g.i. 4 mm wire of is 7887. no of vertical wire 12 & 150 mm ring spacing, top cup190x20x1.2mm thickness, bottom cup160x1.2mm thickness ( as per drawing at annexure-v )