Stop pallets from entering flue spaces with Savety Flue Guards! These durable steel rack protection accessories produce a 3" gap on each side of your rack's frame where installed, creating the required longitudinal flue space for a safe racking system. Longitudinal flue space is the necessary horizontal gap between each parallel row of pallet rack that is crucial for fire safety by allowing for sprinkler water penetration and heat venting. Thick steel construction stands up to repeated loading and unloading of your rack system. And with hardware included, installation is simple and efficient!