supply of supply of permanently lubricated two layer type hdpe duct, outer dia 40 mm, inner dia 33 mm with three end plugs and two couplers for every km length of pipe in length of 500m confirming to rdso spec. no. rdso/spn/tc/45/2013.rev.2.0, amendment 2.0 or latest.the hdpe duct should be pre inserted with 4 mm nylon rope, inside the hdpe duct. warranty upto 30 month from date of delivery.supply of permanently lubricated two layer type hdpe duct, outer dia 40 mm, inner dia 33 mm with three end plugs and two couplers for every km length of pipe in length of 500m confirming to rdso spec. no. rdso/spn/tc/45/2013.rev.2.0, amendment 2.0 or latest.the hdpe duct should be pre inserted with 4 mm nylon rope, inside the hdpe duct. warranty upto 30 month from date of delivery.,supply of permanently lubricated two layer type hdpe duct, outer dia 40 mm, inner dia 33 m m with three end plugs and two couplers for every km length of pipe in length of 500m confirming to rdso spec. no. rdso/spn/tc/45/2013.rev.2.0, amendment 2.0 or latest.the hdpe duct should be pre inserted with 4 mm nylon rope, inside the hdpe duct. warranty upto 30 month from date of delivery. [ warranty p eriod: 30 months after the date of delivery ] ]