Think Crucial 2 Replacements for Shark Belts Fit NV350, HV400 & NV500 Series HIGH QUALITY VACUUM BELTS that replaces your Shark Drive belts. Restore power and torque to your vacuum again. HEALTHIER LIFESTYLE! A new belt makes your vacuum's roller dig deeper and kick up more dirt, making your carpet even cleaner than before. Feel good about laying on your carpet. EASY TO INSTALL so you can get back to cleaning as soon as possible. With just a few minutes and a basic tool kit, you can install your new belt quickly and easily! SAVE MONEY by using a new belt. When your vacuum has to work harder to turn your beater brush, your vacuum's motor has to work harder. Avoid that extra wear and tear! GUARANTEED SATISFACTION because of a 30 day full money back guarantee and a trusted Think Crucial warranty. We are so confident in our products that we have no problem giving you every penny back if you're unhappy with your purchase. You won't see promises like that from big box brands!