red paving bricks 1.never fade 2.No radiation,dust, pollution 3.ecological ... : Purple Sand Clay2. Size: 220x110x40mm3. Function: Anti-freezing,Acid Resistance Bricks,Firebricks4. Colors: Red,Grey,Gray,Yellow,Brown5. Compressive Strength: 25Mpa6 ... ,220x220mm,250x250mm,and etc.5.thickness: 30mm,40mm,50mm,60mmApplication: paving bricks, fire brick