supply of filter bag (i/d 150 mm x 4050 mm long) f [filter bag (i/d 150 mm x 4050 mm long) for fume extraction system-3 to rwf drawing no 731900310590.filter bag (i/d 150 mm x 4050 mm long) f [filter bag (i/d 150 mm x 4050 mm long) for fume extraction system-3 to rwf drawing no 731900310590.,filter bag (i/d 150 mm x 4050 mm long) for fume extraction system-3 to rwf drawing no 731900310590. note: a) five numbers as sample should be supplied for appro val before bulk supply. b) material test certificate for various parameters as per draw ing must accompany the supply. c) a cloth label indicating the suppliers name and po re ference shall be stitched at the hand grip for each bag for identification purpose. ] => limited