【Compatibility】Fits models: Automatic X1, Automatic X4, Automatic X4 Pet, AUTOMATIC XP2, Automatic XP3, C1, C2, C2 Total, C2.1 Green, C2.1 Red, C3, C3.1 Blue, C3.1 White, X1, X1 Grey, X1 White, X2, X2 Grey, X3, X3 Grey, X4, X4 Blue, X4 Extra, X4 Pet, X4 White, X5, X5 Blue, X5 Extra, XP2, XP3，K1,K3,Essential G1 G2 G5 & Mechanical 300 350 upright vacuums, ensuring a perfect fit and optimal performance. 【High-Quality Material】Made from durable, high-efficiency filter material to trap dust and allergens effectively, keeping your home cleaner and healthier. 【Additional compatibility】Also Compatible With Windsor Sensor S-12 S-15 & S2 SR12 SR15 SR18 HEPA XP12 XP15 XP18 & Versamatic Plus 14" 18"，and fit Kenmore Professional Series Uprights Which Use Kenmore Type W 50015 Bags. 【Improved Airflow】 Engineered to maintain strong suction power and airflow, ensuring your vacuum cleaner operates at peak efficiency. 【Eco-Friendly】 Reusable and washable options available, reducing waste and providing a cost-effective solution for long-term use.