. 30" Black Metal Stool-Black Poly Seat The polystyrene seats attach quickly to the preassembled chair and cleanup is quick and easy with water and a neutral detergent. A powder coated, galvanized steel frame with cross bracing underneath the seat adds extra stability, holds up to 500 lbs. Upgrade the seating in your restaurant, eatery or home with this colorful stackable bar stool boasting an all-weather poly resin seat.