Hello! We are looking for the supplier - manufacturer of the calcium silicate boards. Here is our specification: Dimenions 1220*2400*40mm [mm] Dimensional tolerance of thickness ± 0,5 [mm] Dimensional tolerance of length and width ± 1 [mm] Bulk density (dry ± 15%) ≤ 650 [kg/m3] Flexural strength (EN 12467 ± 10%) ≥ 3,5 [N/mm2] Compressive strength (EN 789 perpendicular to board plane) ≥ 6 [N/mm2] Tensile strength (EN 319 perpendicular to board plane) ≥ 0.8 [N/mm2] Thermal conductivity (EN 12667) ≤ 0,24 [W/mK] Surface of front and back face: smooth, sanded Colour white