all original and hard to find late 19th century american ornamental cast iron interior commercial building ventilation grate surround designed and fabricated by the tuttle & bailey manufacturing co., new york city, ny. the gravity furnace floor grate surround contains raised borders with textured background and lightly embossed decorative design motifs. the iron surround is free from cracks or breaks. measures 27 x 30 3/4 inches. two matching surrounds available.