Treadmill Doctor Horizon Advance 200 Treadmill Running Belt Serial# (TM67) Review HelpfulOwl Treadmill Belts May 16, 2018September 2, 2018Exercise & Fitness, Exercise Machine Parts & Accessories, Sports & Fitness, Sports & Outdoors, Treadmill Doctor 0 Comment This is the replacement walking belt for the Horizon Advance 200 Model Walking Belt Size