Replacement carbon range filter made by Filter Everything and compatible with Nutone 21190-000. Dimensions measure:7-1/4 X 19-3/4 X 3/8. Sold as a 1-Pack. Our filters are manuctured to meet or exceed OEM quality and are fully compatible with the name brand (OEM) model. Aluminum filters should be cleaned every 60-90 days; carbon filters should be replaced every 6-9 months. Proudly packed and shipped from our facility near Cleveland, OH.