This is 4 New High Quality Durable Vacuum Belts Designed To Fit Kenmore Uprights Using UB-11 Belts. Designed & Engineered By Crucial Vacuum. Highly recommended to change your belts every 3 to 6 months for optimal performance. If you notice any wear or tear, in your belt, please replace immediately. This is a generic product designed and engineered in the United States by Crucial Vacuum. This is not a Kenmore OEM product and is not covered under any Kenmore manufacturer's warranty. The Kenmore brand names and logos are the registered trademarks of their respective owners. Any use of the Kenmore brand name or model designation for this product is made solely for purposes of demonstrating compatibility.