discount quad extensions gym Qingdao HOS Fitness Equipment Co.,Ltd is loade in Qingdao which is a beautiful coastal city,specializing in the production of fitness equipment more than 10 years. HOS fitness has build Modern Enterprise System to strictly manage the whole process from engineering, purchasing, manufacturing, quality control to sale and after service, to manufacture high quality fitness equipment. Our product lines include a full range of both strength training and cardio training machines. The unwavering support from our customers has been the sole contributing factor that has allowed us to not only continue to expand, b