Supply Of Plastic Cover For 4-Aspect Signal Unit Cover Is Opened From Front Side And Bottom Si De And Made Of Black Polythene Sheet Of 100 Micron Thickness , Size 1700 Mm X 460 Mm X205 Mm. On Bac K Side 75 Mm Wide Corner To Corner Diagonal Cross Mark Of White Colour Of 100 Micron Thickness To Be Provi Ded.To Tie Up Cover Signal Unit Suitable Nylone Rope Of 5 Mm Dia And 4 Mtrs . Leghth To Be Provided On Front Side And Of 1.5 Mtrs [ Warranty Period: 30 Months After The Date Of Delivery ] ]