This group is for masonry fireplaces, with extra teeth for less wood waste. (Made of 5/8" square bar, 16" deep, with center legs.) Part # Grate Size Teeth Weight ALM 18x5/8" 18" 6-bar 18.00 lbs ALM 24x5/8" 24" 8-bar 22.75 lbs ALM 27x5/8" 27" 9-bar 25.75 lbs