... Calcium Carbonate 3,Interior structure: Honeycomb Function: Fireproof, Moisture-Proof, Smoke-Proo...Feature: Artistic Ceilings, Honeycomb Ceilings,...Ceiling Tile ... fire proof, flame-resistant, heat insulation, heat preservation 3.Smoke-proof; sound-absorbing and impact resistant 4. ... quality control system guaranteed the best product quality.3.Twelve lines work together, prompt shipment without delay ...