Full commercial grade, 11-gauge steel frames/tubes, made in the USA. Integrated 5 lb. increment “drop down” add-on weight system. Fully illustrated instructions on each machine. Seven dual function machines and 11 single function units. Optimal strength curve technology for proper muscle/joint loading. User-friendly with quick and easy adjustments and molded accessory tray. Adjustments fully indexed for documentation and repeatability. Strong Kevlar reinforced belt drive system on most units. Molded, marine grade upholstery for comfort and improved aesthetics. 12-year warranty on frames, 3 years on moving parts, 1 year labor and 6 months on upholstery, pads and grips.