Flexible Polyamide Corrugated Conduit, As Per Rdso Specification No.Rdso/P E/Spec/Ac/0138 - 2009 (Rev - 1 ). Annexure- A, Of Nominal Size: Nw70, Outer Dia (Mm):80.0 +/- 0.2. Length Of Each Roll 3.5 Mtr. Or Multiple Of 3.5 Mtr. [ Warranty Period: 30 Months After Th E Date Of Delivery ] ]