The ORIGINAL Poly Bale Feeder. All stainless steel hardware is used to secure 2 rings to 3" legs. Polyethylene is lightweight, durable, and will provide years of trouble free service. Polyethylene pipe has been tested to withstand temperatures ranging from -180 degrees F to 260 degrees F. It will not degrade from sunlight. Life expectancy is conservatively, to be in excess of 50 years. The 8x32 is designed for the horse to reach over to get to the hay. It is not recommended for cattle.