Pre-owned Steelcase Millbrae Contract 4 Seat Lounge. Mid-Century design, Millbrae Contract Lounge amplify's the social atmoshere for contemporary workplaces. Built with a horizontal steel bsae that forms a simple modernist foundation for a classical upholstered seating. Finishes: Grey / Steel. Dimensions: 104" W x 30" D x 17" Seat height, 31" Overall height.