Description Plastic Baler Twine provides the optimal durability and strength. Blackgold is manufactured by Bridon Cordage. Blackgold Bridon plastic baler twine has a 440# knot strength for 3' x 3'; 3' x 4', and 4' x 4' balers. This product shipped as a single spool with no box. Bridon Cordage is ISO Certified for consistent QUALITY that you can count on.