supply of supply of plastic cover for shunt signal unit cover.supply of plastic cover for shunt signal unit cover.,supply of plastic cover for shunt signal unit cover operated from front & bottom side of bla ck polythene sheet of 100 micron thickness size of 375 mm x 300 mm x 150 mm and back side 50 mm corn er to corner white diagonal mark of silver color of 100 micron thickness to be provided with suitable nylon rope of 5 mm dia and 1.5 meter length. [ warranty period: 30 months after the date of delivery ] ] , supply of plastic cover for route body opened from frant side and made of plas tic sheet of 100 micron thickness size 685x76 mm, round shape and in back side 50 mm 100 mic ron thickness silver colour cross mark.5 mm dia nylon rope to be provided on front side t o tie up. [ warranty period: 30 months after the date of delivery ] ] => limited