Package of (3) Genuine Kirby 301291 Belts for all Kirby vacuum models. Theses Genuine Kirby belts will have “Kirby 301291” in white or yellow printed on them. The Kirby 301291 belt is the new Kirby belt with the knurled tread pattern on the inside. If you receive belts that do not have the Kirby 301291 printing, or belts that are smooth on the inside, then you received generic replacement belts. Replace these belts every 3 months to ensure optimum performance.