Metallic Expansion Bellows for Boiler Ducts are available in different size ranges varying from 200 mm to 8500 mm diameter. These Expansion Bellows are made using quality grade metal to ensure fine finish and long lasting usage. These Expansion Bellows are mainly designed for boiler ducts. Metallic Expansion Bellows for Boiler Ducts are offered with single, double, triple and quadruple bellows and can be availed with multiple corrugation as per specific requirement.