All heavy duty, 24-7, big and tall executive chairs at ERA Products is individually crafted and assembled to meet GSA durability testing standards. They began building car seats 35 years ago for Ford, GM and Crysler and continue to hand craft each steel frame for style and strength, using all of the trade secrets they've learned through this legacy. Rated for up to 500 lbs., they're built like tanks and guaranteed to last a lifetime!