Antique Cast Iron Grill Floor Vent Heat Grate Gothic design Old Vintage . It is not marked the manufacturer is unknown. Some rust has taken place.  Overall good condition. Please look over the pictures and ask questions when needed. Thanks for looking!Measures approx: Overall - 15 3/4"  x 12" Rough Opening: 14" x 10 1/8"\nMeasures approx: Overall - 15 3/4"  x 12" Rough Opening: 14" x 10 1/8"\n\n\nMeasures approx: \n\nOverall - 15 3/4"  x 12" \n\nRough Opening: 14" x 10 1/8"\n\n