Dimplex DFI23TRIMX Expandable Trim Kit for Electric Fireplace Insert Trim kit provides an elegant black trim around fireplace opening For use with a Dimplex electric-fireplace insert Expandable to accommodate various fireplace designs About 2 inches of depth for visual appeal; installs easily; wipes clean Measures 24-1/2 to 43 inches wide by 19-1/2 to 28-1/2 inches high; 1-year limited warranty