Shark NV370 Series Belt for the Navigator Pro Vacuum Model NV370, NV370 26 Package of (1) replacement belt for Shark Navigator Lift-Away NV370 Series Vacuum The belts from "Belts, Vacs, Parts & More" do not need to be replaced every 6-12 months. Buy only from "Belts, Vacs, Parts & More" to recieve instructions for replacing your belt. 30-day warranty only if you buy from "Belts, Vacs, Parts & More" New