This Oster electric wok features Oster DiamondForce nonstick coating, Oster's longest-lasting nonstick yet. DiamondForce Nonstick is infused with diamond particles that form a structural matrix, creating a stronger coating to provide easy food release and superior nonstick performance over time. This 4.7-quart wok includes a tempered glass lid with a cool-touch knob, plus cool-touch handles on the sides. The removable temperature probe easily lets you adjust temperature for cooking a variety of foods. And the PFOA-free, diamond-infused nonstick surface means hassle-free cleanup.