Engineering Purpose Metal Made Header Ring is available in sizes of 12 inches to 144 inches and comes with 63 microns on slope and flanges finish. The Header Ring is made of cast iron, ductile iron, carbon steel and aluminium which ensures optimum durability along with long lasting trouble free service. The Header Ring is strong and rigid in construction and requires minimal maintenance. Engineering Purpose Metal Made Header Ring is available in various shapes like round, elliptical, arch and egg.