Fusible link fire damper* for use with 100mm round ducting. Can be mounted vertically or horizontally and have a one hour fire rating in both directions. *Manrose Manufacturing Ltd does not guarantee compliance with Building Regulations Part B, Fire Spread or other regulations that relate to fire planning. Suitability to comply with these regulations should be determined prior to installation and in conjunction with Building Control Officers. Compliance with the Regulations is specifically excluded from quotations and designs.