Polyamide-6(Pa-6) Halogen Free, Fire Returdent Flexible Corrugated Conduits,Normal Size- Nw-23, Outer Dia-28.5 Plus/Minus 0.2 Mm, Conforming To Rdso'S Specification No. Rdso/Pe/Spec/Ac/ 0138-2009 (Rev. 1 ). [ Warranty Period: 30 Months After The Date Of Delivery ] ]