Grosfillex US495002 Charcoal Miami Bistro Stacking Chair (case of 4)Features and Benefits: Passes ASTM F 1561 96 Class B performance standard for commercial outdoor seating Rated to 300 pounds for safe use in commercial environments Chair made of 100% prime synthetic resin. U. V. stabilized for greater resistance to sun degradation and changing weather conditions. High, contoured and flexible back joints with a shaped seat for extra comfort Glossy and matte alternating stripes further enhance the design of the seat.