National Hardware N301-606 4075BC Expanded Steel - 3/4" Grid, 13 Gauge in Plain Steel, 24" x 24 This flattened steel with 3/4" grid pattern can be used for machinery guards, screen door protectors, and ventilated motor housings Item isn't treated for weather conditions; must be protected to prevent corrosion Manufactured from 13 gauge hot-rolled steel Comes in multiple sizes for every project needs LifeSpan Limited Lifetime Warranty Manufactured from 13 gauge hot-rolled steel Unfinished plain steel 3/4 in grid pattern