Cowboy Cordage 4- Strand Tan Uoza Black Label Calf Rope4 Strand Core Treated 28' All of our tie down ropes are treated in our special blend of oils to bring out each ropes peak performance. Our Black Label Uoza Poly is the original, leaded core poly. Traditionally, each individual strand of Uoza poly rope had a lead core, both in the 3 strand as well as the 4 strand ropes. However, now some larger sizes may have only two leads such as the 4 strand tan, and some smaller sizes may only have 2 strands, such