All ERA products, including their heavy-duty, 24/7, big and tall office chairs are individually crafted and assembled to meet GSA durability testing standards. ERA began building car seats 35 years ago for Ford, GM, and Chrysler. Now ERA has continued to handcraft each steel frame of their seating options for style and strength, using all the trade secrets they've learned through this legacy. ERA seating products are rated for up to 500 lbs. and are built like tanks, guaranteed to last a lifetime!