supply of plastic coverplastic cover,plastic cover for route signal unit opening form front side bottom side. x mark to be painted with white colour covering the entire back side. , plastic cover for calling-on signal unit opening from front side bottom side. x mark to be painted with white colour covering the entire back side. , plastic cover for 4 aspect signal unit opening from front side bottom side, x mark to be painted with white colour covering the entire back side. size: 164 cm x 30 cm x 19 cm with approximate 100 micron plastic. , supply of plastic cover of 2 aspect signal unit cover operated from front side & bottom side made of black polythene sheet of 100 micron thickness size of 1200mm x 460mm x 205mm and back side 75mm wide corner to corner diagonal to be provided total up cover with signal unit suitable nylon rope of 5mm dia and 4 meter length to be provided on front size and of 1.5 meter length at centre. accepted make/brand - self , supply of plastic cover for shunt signal unit cover is opened front side and bottom side made of black plastic sheet of 100 micron thickness size 50mmx300mm x150mm. on back side 50 mm wide corner diagonal cross mark of silver colour of 100 micron thickness to be provided to tie up cover with suitable nylon rope of 5mm dia. (sample willbe approved by consignee