FNN1037: Features: -Color: Black. -Available in 12 Quart and 18 Quart sizes. -Constructed of natural and recycled rubber for long lasting durability. -Strong, flexible and durable. -Concealed heating element-hidden from animals. -Thermostatically controlled to operate only when necessary. -Resists cold weather cracking down to -35 degrees Fahrenheit. -Anti-chew cord protector deters animals from chewing.