supply of filter bag (i/d 144 mm x 5040 mm long) for fume extraction system 1 & 2 asper rwf drg no. 721 9003 10410. note:- a) five nos. sample should be supplied forapproval before bulk supply.b) material test certificate for various parameters asper drawing must accompany the supply. c)a cloth lable indicating the suppliersname & po no.& date shall be stiched at the hand grip for each bag for identificationpurpose.