Vital Parts plastic round fence post caps are a type of fence post cap that are designed to fit on the top of round fence posts and are made of plastic (polyethylene). They are designed to provide a finished look to the fence and to protect the top of the post from weathering. They are easy to install and fit on to the top of the post. They are also lightweight, inexpensive and come in a variety of colours. Round fence post caps are widely used in different types of fences such as wood, vinyl, and aluminum. They are mostly used to provide a finished look to the fence, to protect the top of the post and to prevent injury by covering the sharp edges of the post. They also can be used to compliment the design of the fence and to add a decorative finish. They are also easy to install, and can be used on new or existing fences.