Brick->Isolation->20′ GT-ECOT20L 20′ Eco Therm Brick Dimensions (cm): 19.7×18.5×40.0 Weight (kg/piece): 10.00 Wall thicknes 20cm:Pieces/m2: 12 1m2 Weight/m2: 120 1m3 Weight/m3: 625 Thermal Conductivityi (λ) : 0.230