Single Piece Frp Louver Shutter (2'-0" Wide Window) As Per Drg. No. Ls54102, Alt.-Nil Or Latest , For Lhb Non-Ac Coaches. Colour Of Materials Shall Be Light Grey. Material Spec. As Per Rdso Spec. No. Rd So/2007/Cg-02 (Rev-1), Amendment No.2 Dated Aug 2016. [ Warranty Period: 30 Months After The Date Of Delivery ] ]