Component Hardware Group F35-2020-HD Premium Quality Framed Baffle Type Grease Filter W/handles., Galvanized 20" X 20" X 2", Safe Dependable Positive Flame Barrier Protection., Seamless Smooth Surfaces Permit Constant Grease Run-off, Into Hood Collection Troughs Easily Cleaned By Soaking Or, Spraying Or In Conventional Dishwasher., Ul & Mea Approved., First Two Numbers Of Size Indicate Vertical Height. Second, Two Numbers Represent Horizontal Width Both Are Nominal, Dimentions., Actual Size Of Filters Are 7/16" Less Than Nominal., Actual Thickness Is 1-3/4".