Some eight Iranian companies active in the field of construction are participating in the 14th edition of International Build Asia Exhibition, which is being held in Karachi from Dec 15-17. According to Mahmoud Haji Yousefipour, Iran's commercial attaché to Pakistan, the Iranian representatives are showcasing building material and tools, including cooling and heating systems, fireproof and waterproof building products, door knobs, construction machinery, concreting instruments, and firebricks.