The product descriptions list aluminum for the cooking surfaces and plastic for other parts/housing.
The listings show models with 1300 watts and 1150 watts output.
Descriptions list models sized for 4 servings and for 5 servings.
Reported ranges are: height 6.5–12.4 in, width 5.2–12 in, depth 12–13.6 in, and weight 6–7.39 lb.
Descriptions reference an advanced nonstick coating that’s easy to clean and reduces the need for butter or oil; durability claims vary between listings (one says 3x more durable, another says 2x more durable).