Horizon CST 3.5 Treadmill Walking Belt for Serial Number TM160 Review HelpfulOwl Treadmill Belts May 11, 2018September 2, 2018Exercise & Fitness, Exercise Machine Parts & Accessories, Horizon, Sports & Fitness, Sports & Outdoors 0 Comment This fits your . Make sure this fits by entering your model number. 1 Year Warranty This Is The Replacement Walking Belt For The Horizon CST 3.5