FeaturesSmooth, rounded integral bushing in each hub to protect conductor insulationAccurately tapped, tapered NPT threads for tight, rigid joints and ground continuityHeavy duty design resists mechanical abuseElectrical conductivity equal to rigid conduit on a similar length basis - no bonding jumper requiredInterior insulating liner protects conductors from abrasion under vibrating conditionsBoth end fittings are female, each furnished with a removable male nipple