The CenFlex 660 ft. x 5 in. Flexible Horse Fence Rail attaches directly to the end fence posts using specialized Sure-Fit tensioner and termination brackets. The length of the high-tensile fence rail is held in place with custom line post brackets that allow the rail to slip freely, providing rail flexibility and easy adjustment. CenFlex has the traditional look of board fencing without high maintenance costs. The CenFlex flexible rail will not splinter, rust, rot or crack. Enjoy decades of secure containment with minimal maintenance and no painting required. Safer than wood or PVC, the high-tensile technology of CenFlex can hold up to 4,200 lb. of break strength, safeguarding your horse from serious injury due to splinters or impact. The CenFlex rail may be used in a variety of horse fence combinations. CenFlex can also be used as a top rail over our signature single strand Poly Plus (non-electric) or White Lightning (electric) fence. This high-tensile field fence should be installed on a 4 to 6 in. wood line post and a 6 to 8 in. wood termination/end and corner post. Due to the high-tensile nature of CenFlex rail, bracing and concrete is recommended at gates and corners but not required on straight runs of line posts. CenFlex flexible fencing systems are specifically designed for horse and other large animal containment. Utilizing advanced high-tensile technology, CenFlex fencing provides ultimate strength, flexibility and long-lasting protection for you and your horse.