The 9300 Silhouette stack chair is durable and classy enough to use in your busiest social setting, be it a dining room or corporate banquet hall.It features a strong square 18gauge steel frame plus an underseat Hshaped brace for extra support.The seat features supremely comfortable and spacious 2"thick highdensity foam padding with institutional grade vinyl upholstery or fabric, and a waterfallstyle edge.Plywood core within both the seat and crownstyle backrest which has a builtin handle for easy moving and stacking.Fortifying stacking bars and twelve plastic bumpers protect the powdercoated paint finish from scratches when the chair is stacked (up to ten units high.)