GrillGrate’s air flow vents and flat side work together to trap grease, prevent charring, and block those pesky flare-ups that tend to engulf and dry out food. When we say better, juicier food every time – we mean it! It is central to the innovative design of this grate. The sizzling-hot valleys vaporize drippings and juices, retaining moisture and enhancing flavor. Fits the Napoleon Prestige 500 & 500 RSIB. Set Includes: (5) 17.75” panels + (1) 17.625” gap. Assembled dimensions = 17.75” deep x 27.5” wide.