PETSTANDARD Replacement Filter Compatible with SHELANDY Pet Dryer. These are PET STANDARD branded filters and are not created or sold by SHELANDY. Pack of 6 Filters. Filter Measurments: 5" x 4.5" x 0.85", Diameter of allow circle 0.5". Compatible with models STL-1902 / 1903 / 1904 / 1907 / 2401 / 2402 / 2404. Activated Carbon Mesh. Effectively protect your motor from debris, hair, etc... CAUTION: Filter wet or blocked may cause motor failure, please regularly check and clean the filter. Please feel free to contact us if you have any questions about our products, we'd like to help you!