Hallmark Metallica. is a force to reckon with in the field of manufacturing and exporting premium quality Fittings, & Flanges in Carbon Steel, Alloy Steel, Stainless Steel, Duplex Stainless Steel and Cupro Nickel and Low Temperature Services. We are based in Mumbai (India), the company has scaled incredible heights in business owing to its innovative products. The company's productivity and clients base is always on an upward swing.