Khurana Carbides Private Limited manufactures Black Bar Straightening Rollers. Khurana Carbides Private Limited is an ISO 9001:2008 certified company. The Company also manufactures tungsten carbide wire, bar and tube drawing dies in all shapes and sizes. The Black Bar Straightening Rollers are designed for electric resistance welded [ERW] pipes and galvanized pipes. The Black Bar Straightening Rollers have size ranging from 30.00mm to 150.00mm.