General description Brand new and high quality replacement dust bags compatible with Kenmore IB600, BU4022, BU4020, BU4018, and BU4050 vacuum cleaners. Made of high-strength, environmentally friendly material, these dust bags are easy to install and maintain optimal performance of your vacuum cleaner. Technical specifications Material: Cloth Color: As shown Package Contents: 15 x Dust Bags Measurement allowed error: +/- 1-3 cm Usage It is suggested to replace the dust bags every 1-2 months to ensure efficient vacuum performance.