Features: No other tools needed, easy to install and remove. Helps protect dust cleaner from dirt that causes damage. This filter is specifically designed to purify the air in most air conditioning units. Easy to replace and disposable, no tools required. Replace every 6 months for optimal performance. Available in 4 standard sizes: 23x23cm, 30x30cm, 45x150cm, or 45x250cm. Specifications: Material: Polyester Thickness: Approximately 5mm Size: Approximately 23x23cm, 30x30cm, 45x150cm, or 45x250cm (optional) Note: Please allow 1-3cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the image may not reflect the actual color of the item. Package Includes: 10x Air Conditioner Filter with Magic Hook (23x23cm or 30x30cm) Or 1x Air Conditioner Filter with Magic Hook (45x150cm or 45x250cm)