Construction Fin arm. Removable, cylindrical, solid oak wood legs. Loose cushions; available in multi-seat or bench cushion. Cushions are down-blend-wrapped for a softer feel. Expertly crafted engineered wood frame with mortise-and-tenon joinery, which provides exceptional structural integrity. No-sag steel sinuous springs provides cushion support. Hidden steel connectors hold modular pieces securely together. Adjustable levelers provide stability on uneven surfaces. Choose components to build y