Steel frame; height-adjustable back Accommodates users up to 250 lbs., 6.5 ft. Safety system provides stabilityFoot holders equipped with safety locks for secure workout Up to 90-degree inversion Foldable design for easy storage Lifetime warranty on frame; 3-year warranty on parts About Kettler Products This item is manufactured by Kettler. Throughout the world, Kettler is a leading brand in leisure furniture, sports and fitness equipment, table tennis tables, bicycles, and children"s outdoor toys. Since 1949, the company has grown from a small enterprise in Heinz Kettler"s home town of Ense-Parsit in Germany into a world-wide manufacturing and marketing organization. Heinz Kettler has always remained true to the "Made in Germany" quality principle and it is still the central pillar of the company"s management philosophy. This means that even after 50 years of trading all over the world, most of the factories, and particularly the most important 1s, are still in Germany. Backboard material: nylon. Easy table adjustment. Safety features prevent accidental tilting. Frame material: steel. Full 90-degree inversion.