Titan package T3-B2 includes (2) flat belts specifically designed to work on Titan T3000 & T3100 upright vacuum cleaners. These belts are made from a better rubber compound to insure long life and consistent brushroll speed for better performance. We recommend changing your T3000 or T3100 belt every 6-12 months with the T3-B2 flat belt to insure proper brush speed. Even if you don't believe the belt is worn do not let your belt go more than 12 months. These belts are friction driven and the constant tension causes the belts to loosen over time.