Replacement aluminum range filter made by Filter Everything and compatible with Imperial Cal RHF1108. Dimensions measure 11-5/16 x 19-15/16 x 1/2. 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.