Girtech Usm-5 Heavy Duty Firebricks 5-Pack Fireclay, Chamotte 3000F Us, Forge GIRtech USM is a special heavy duty thin firebrick which are used for masonry and lining of any household heating units, fireplaces cladding, mini-forges, as well as for household buildings. Maximum operating temperature is no more than 2760 F. Refractory masonry must be done on a fireclay/alumina mortar, for example GIRtech CONTACT-40. Before performing work, it is necessary to moisten the contact surface with some water. It is possible to use a cement mortar only for masonry of non-thermal household units, without subsequent ignition. GIRtech USM could be cuted or processed with a special tool if necessary. It is made from eco-friendly natural components and safe for human health. This product is not intended for use in industrial units where contact between the refractory lining and molten metals is possible. Appearance, sizes: hearth plates 9.0*4.5*1.25 inches Composition: fireclay, quarz sand Net Weight, lb 3.97 Minimum refractoriness: 2 760 F Interconnected porosity, % 18.5 Apparent specific graviry, ln/in3 69 - 72 Compressive strenghth, psi 2 700 - 3 300 Thermal expansion coefficient (2 372 F): 0% Thermal resistance, thermal cycles (32F to 1700F) 40 Safety: non toxic, safe for human health Product Features GIRtech USM ? chamotte firebrick has improved thermal conductivity compared to traditional chamotte products. Firebrick can be used in any type of domestic heating units, such as brick fireplaces, steel furnaces, heating stoves, barbecues and barbecue complexes, ceramics kilns and blacksmith forge. It can be used both for arranging the hearth of the furnace and for lining the inner surface of the furnace. Could be cutted or processed with a special tool if necessary. It is made from eco-friendly natural components and safe for human health Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!