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Discount wholesale Seal Around Door - Fire viewer – Gallford
Product Description When temperature goes up to 180℃ in fire, the intumescent core inside of door viewer will rapidly expand to filling the interspace to stop fire, smoke or gas through out. • Material：Available in either brass or chrome finish • Visual angle：100-130 degree • Diameter：25mm • FV25-1 suitable for 40-60mm thickness of fire door FV25-2 suitable for 60-80mm thickness of fire door ...