Seating - Endurance Cube, Stone Gray : The Endurance Cube features a durable, one piece, rotationally molded design for increased strength. Constructed of high impact "no break" polyethylene. No steel or wood components. Stain resistant. Bolt to the floor via concealed pilot holes with hardware of your choice. Easy to clean and maintain. Flame Retardant (passes Cal 133). Test reports available upon request. Manufactured to ISO Quality Standards in the USA.