for K1/K3 Series: Designed specifically for Airbelt K1 & K3 vacuums, these replacement bags seamless compatibility and optimal suction performance Premium Material: Made of high-density material with an outer layer that captures larger debris and an inner air filter layer that captures 99.99% of tiny particles Strong Seal: Self-sealing ferrule ensures a tight seal to capture dust and debris. Upgraded sealed entry holes and edges prevent spillage Convenient Installation: Easy-to-install top loading collar makes changing bags a breeze. Just place the bag, close the lid, and you're all set Color: As Shown Material: Non-woven fabric Package Contents: 12 x Vacuum Filter Bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.