Features: No other tools needed, easy to install and remove. Helps protect your vacuum cleaner from dirt that causes damage. This filter is specially designed to clean most air conditioning. Easy to replace and disposable - no tools required. Replace every 6 months for optimal performance. 4 standard for your option: 23x23cm/30x30cm/45x150cm/45X250cm. Specifications: Material: Polyester Thickness: about 5mm Size: about 23x23cm/30x30cm/45x150cm/45x250cm (optional )Package include: 10xair air conditioner filter with magic hook (23x23cm/30x30cm) or 1x air conditioner filter with magic hook (45x150cm/45x250cm) Note: Please allow 1-3cm error due to manual measurement. Please make sure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item.