Poly-Cap is an inexpensive way to add safety, reduce player injuries, increase visibility and beautify any field. Poly-Cap is the original fence cap and is still the best! Manufactured with the thickest wall creating unequaled durability and UV protection. Compare Poly-Cap to the competition and you will find it to be 20% thicker! Poly-Cap is weather treated and UV-protected, and features a 4-1/2” diameter polyethylene construction that will offer years of protection.