*PLUMBERSSTOCK EXPERT* responded:
Good day! We appreciate your interest in our NDS 1815 18" x 18" Galvanized Steel Grate. This grate's depth is 1". It is 16 3/4" wide, 16 3/4" long with 1" sized openings. It accommodates 381.21 GPM and weighs 17 lbs. You may want to check this manual specifically on page 7 for the detailed dimensions. Should you have further questions, please let us know. If you find that this is exactly what you need, just click Add To Cart and you're all set! Thank you for shopping with plumbersstock.com – the perfect site to find high-quality products at low, low prices!