The Outdoor Plus Square 84" Hardieboard & Steel Frame Liquid Propane Ready to Finish Fire Table with Flame Sense with Spark Ignition v277 375" Door opening – dimension Size:30" Beach Pebble Lite Stone Ball Set 375" Door opening – dimension (Height) 8 3 4" Door opening dimension (Width) 17 1 4'' Firebox – dimension (Height) 11 7 8" Firebox – dimension (Width) 19 5 8" Firebox – dimension (Depth) 13 1 2" Firebox lined with refractory bricks for better heat distribution Yes Stainless steel secondary air system improving gas combustion Yes Adjustable threaded legs Yes Steel thickness – body 3 16" Steel thickness – top 5 16" Fireplace opening – minimum (Height) 21 1 2" Fireplace opening – minimum (Width) 27 1 2" Fireplace opening – minimum (Depth) 12 7 8" USA standard (emissions) EPA Canadian Standard (emissions) CSA B415 It's simple mechanism makes it possible to close the damper tightly when the wood stove insert is not in use What's Included Made in the USA