Multilok® 1 Portable Dance Floor Set, 12' x 21', 4" width trim, consist of (25) 34" x 34" full panels, (6) 34" x 17" half panels, (18) full edges, (4) half edges, (2) left corners & (2) right corners, for indoor/outdoor use, waterproof & recyclable, aluminum tray and extruded composite base board, vinyl tile finish