Handmade black brick, custom made (closter bricks, gothic bricks, and others dimension). Manufactured to order. Color: black / graphite (shaded). Backed in coal stove (Hoffmann’s Kiln). On Picture dimension: 320 x 160 x 80 mm.
compressive strength: 10 N /mm2
absorption of water: 17-20%
gross density: 1,7 Kg /dm3