Check the listing for details. GIRtech USM-2 Heavy Duty Insulating Firebricks Fireclay Chamotte 3000F Pack of 2. Color: Beige/Brown/Sandy-Colour May Vary Due to Natural Ingredients, Condition: New. Listed at 25.99 USD. BrandGIRtechMaterialFireclayFlavorno flavorItem Weight4 PoundsItem FormRectangularAbout this itemEnhanced Thermal Conductivity: GIRtech USM fire bricks offer improved thermal conductivity compared to traditional chamotte products. Experience superior heat transfer and distribution, maximizing the efficiency of your heating units.High Refractoriness and Versatile Use: With a refractoriness of 2760 degrees Fahrenheit (insert temperature range), these fire bricks are suitable for various domestic heating units. Perfect for brick fireplaces, steel furnaces, heating stoves, barbecues, barbecue complexes, ceramics kilns, and blacksmith forges.Hearth Arrangement and Furnace Lining: Utilize these fire bricks for both arranging the hearth of the furnace and lining the inner surface. Ensure optimal insulation and protection for your heating unit, extending its lifespan and improving performance.Use with Fireclay/Alumina Mortar: Refractory masonry requires a fireclay/alumina mortar, such as GIRtech CONTACT-40 or GIRtech CONTACT Drymix. Prior to installation, moisten the contact surface with water. Avoid using cement mixes as a masonry mortar.Cuttable and Processable: GIRtech USM fire bricks can be easily cut or processed with a special tool, allowing for customization and precise fitting as needed.Suitable for Domestic Use: These fire bricks are intended for domestic heating units and not for use in industrial units where contact with molten metals is possible. Ideal for enhancing the performance and efficiency of your home heating systems.