Features FRAME STRUCTURE - High quality heavy gauge steel construction to ensure stability and durability. FINISH - An electro statically applied powder coating to resist scratches, corrosion and chipping. Chrome-plated components are used in high-contact areas. CABLES - American made mil-spec nylon coated aircraft cable rated at 200 lb. tensile strength is used in all areas of significance. BOLTS - Large, high-grade 3/4" socket head cap bolts in major connection points. PULLEYS - 4 1/2" dia. Heavy duty reinforced fiberglass impregnated nylon pulleys with sealed steel roller ball bearings. BEARING SYSTEM - Solid Steel Sealed Bearing System allows for increased smoothness, precision and durability. MultiSports leads the industry in being the first and only company to upgrade their home-use systems from bushings to an improved state-of-the-art steel bearing system.