The 20" Round Stainless Grid fits on top of the XL Adjustable Rig. The outer ring and center support wire are 1/4" round bar. The 24 crosswires are 3/16" stainless round bar. Wire thicknesses are similar to the Big Green Egg® XL grid. The stainless is EPQ, 304 stainless steel. The grid is electro-polished for improved surface performance and durability. Made in the USA exclusively for CGS.