Our black label Uoza poly is the original, leaded-core poly. Each individual strand of Uoza poly rope has a lead core, both in the 3 strand as well as the 4 strand ropes. The original Uoza poly rope had a yellow, weighted, Enerl core, but this style has not been produced for over 15 years. Uoza rope is available in 3 original colors including white, gold, and tan. Recently we have expanded this line to our popular solid black rope, as well as the black, white, and silver speckle.