Workmanship specification: Produced under iso 9001 quality management system, conform to tuv-gs din 79000 standard. Materials:high quality steel and hot galvanized steel is optional. Main pipe thickness is 3.00mm, supporting part is 2.75mm. Sand blasting machine to clean the rust before coating. Powder coating:electrostatic coating, lacquer that bake treatment. First layer epoxy powder(50-80um), second layer plastic powder(90-140um). Welding technique:arc-welding, cabon-dioxide welding, mixed-gas welding. Stainless screws and nuts. Bearings are from nsk. Product name: outdoor fitness equipment with tuv gs--- rambler (txj-t009) Size: 2531*830*1500mm Vol Function: developing the strength of upperlimbs, chest and muscle groups of shoulder and back, improving the flexibility and stability of shoulder joints and elbows. Direction: hold crossbeam with hands, standing on the pedal, swing legs forth and back just like walking, but do not swing your legs forward or backword at the same time.