Half-bricks, manufactured from machined aluminum clinker. Coal burned in furnaces periodic. With perforation to 15%. Color: shades of red (also opaleniami - according to contract). The product clinker. Full frost.
Half brick made from clay clinker mechanically. Glazed (glaze salt). Coal fired in the furnace periodically. The product clinker. Perofracja to 15% with or without perforation (by contract). Full frost.