Product details:

Material: -Metal. Dimensions: -Center: 12 inch. Size 12 inch W - Overall Height - Top to Bottom: -2.75 inch. Size 12 inch W - Overall Length - Side to Side: -12 inch. Size 18 inch W - Overall Length - Side to Side: -18 inch. Size 24 inch W - Overall Length - Side to Side: -24 inch. Size 30 inch W - Overall Length - Side to Side: -30 inch.