These lifetime heavy duty grates all have 1" thick bars and come in four different sizes.
The 20" wide grate is 16" wide in the back and is 13" deep with 5 bars.
The 24" wide grate is 20" wide in the back and is 15" deep with 7 bars
The 28" wide grate is 24" wide in the back and is 15" deep with 9 bars
The 36" wide grate is 32" wide in the back and is 15" deep with 11 bars.
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Ecommerce Solutions by Mountain Media; "Lifetime Heavy Duty Fireplace Grates")