Triangular Extended Baseboard Return Air Grill (30" x 8" Duct Opening) Extended depth triangular baseboard return air grill Steel with white powder coating and 1/3" fin spacing Fits duct opening that is 30" x 8" with outside dimensions 31 3/8" x 8 7/8" x 3 3/4" base projection x 13/16" top projection Made in the USA