supply of supply of plastic cover for shunt signal & route body . , 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: 12 months after the date of delivery ] ] , supply of plastic cover for shunt signal unit cover operated from front & bottom side of - bl ack polythene sheet of 100 micron thickness size of 375 mm x 300 mm x 150 mm and back side 50 mm cor ner 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: 12 months after the date of delivery ] ] , supply of plastic cover for shunt signal unit cover operated from front and bottom side of bla ck polythene sheet of 100 micron thickness size 375 mm x 300 mm x 150 mm. on back side 50 mm wide c orner to corner diagonal cross mark of silver of 100 micron thickness to be provided with suitable nylon rop e of 5 mm dia and 1.5 mtr length at the centre. [ warranty period: 12 months after the date of delivery ] ]