Tarter’s Poly Bunk Feeders are durable mealtime solutions and designed for livestock that weigh less than 600 lbs. The feeders are made of 1¾” steel tubing. The one-piece, replaceable 9” deep poly bunk liner is made from recycled materials, with no seams or inserts. Add an optional galvanized hay rack to feed hay and grain simultaneously plus cut down on hay waste. Drain holes help prevent standing water to aid in keeping feed fresh and dry.