Standard upholstery has multiple densities of polyurethane foam. Fixed seat and back. Top and Double Needle stitching on seams. Standard with Black High Density Polyurethane resin legs with glides . Ottoman is standard with casters. LED Lighting Option: Please contact customer service for pricing and configuration assistance. For the LED underneath lighting option, the following models are available: 460-3LED, 461-1BLED, 460-4LED, 461-2BLED, 460-4BLED & 461-3BLED Optional Ganging Package contains black steel interlocking plates attached underneath the upholstered units for ‘lift and drop’ style ganging. Optional Floor Mount Legs are available at an upcharge. Two floor mount kits per unit.