This cover provides self-basting spikes on the underside that allow the nutrition and flavor in the steam to drip back onto food. Seasoned and ready to use. Measures 1/4 inch diameter. Fits the 10-1/4 inch skillet, 3-quart chicken fryer, and 5-quart Dutch Oven. Hand wash only; do not submerge into water for long periods of time. Made by Lodge.