Durable impact resistant poly construction with UV protection, and injected with heavy insulation to help prevent water from freezing. Poly float sits on water surface to insulate the water from all sides. Unique drain design allows for watering with or with out a bucket, and makes cleaning easy. Heavy duty 5 gallon bucket is included. Product has been tested to keep water from freezing at temperatures as low as 15 degrees in an occupied stall.* Mounts easily to wood stall walls by simply placing lag screws with washers through the four holes located on the edges. *This test was conducted in a closed stall environment. Actual effectiveness is based largely on product placement, and regular usage by the animal.