Upgrade your GBELLCVR1213BK wind instrument bell cover with this amazing 5-pack of 13-inch MERV 13 filters. These high-quality replacement filters are designed to keep your instrument in top condition. For best results, replace the filters every 1 - 2 months. Remember, these filters are not washable. With exterior dimensions of 13.25 inches in length and width, and a height of 0.02 inches, and a net weight of 0.02, they are a perfect fit. Enjoy the benefits of clean air for your instrument with these reliable filters.

Using these filters is easy. Just remove the old filter from your GBELLCVR1213BK wind instrument bell cover and replace it with a new one from the pack. To keep your instrument performing well, it's recommended to replace the filters every 1 - 2 months. Don't try to wash the filters as it can damage them. Keep the remaining filters in a dry and clean place for future use.