bids are invited for str of op tr portable collapsible protective wall baskets, galvanished welded mesh frame 2 cells per set of size 1.232 x 0.626 x 0.769 mtr under job no 2431 , heavy duty rcc hume pipe type np-3 of 300mm internal dia with collar length of each pipe is 2.50 mtr for drainage , cement opc 43 grade packed in hdpe bag each 50 kg wt confirming to is 8112- 1989 make-birla gold,ambuja,ultratech,acc,jk,dalmia for drainage , coarse sand free from vegetation for drainage , coarse aggregate 40mm graded for drainage , construction mtrl for retaining wall 100 mtr x 4.0 mtr ht size 8.00 mtr x 4.0 mtr ht -12.50 nos as per store list , hydraulic rock drill as per specification and store list attached total quantity : 929