FeaturesRoomy interiors more wiring spaceSmooth, rounded integral bushings in hubs protect conductor insulationAccurately tapped, tapered threads for tight, rigid joints and excellent ground continuityForm 85 copperfree aluminum UNILETS™ are lightweight, selfoxidizing, self-renewing and offer a high corrosion resistanceLightweight aluminum facilitates shipping, handling and installingSizes with flat back design ideal where fitting is mounted flat against surfaceRaintight when a cover and gasket are installed