Replacement aluminum range filter made by Filter Everything and compatible with Imperial Cal S-2021. Dimensions measure 10-5/16 x 21-1/2 x 1.2 inches. Sold as a 2-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.