Tanha Poulad Co. is the manufacturer of variety of roof jacks as follows;T-shape surface threaded jack, simple surface threaded jack, interior T-shape threaded Jack, simple T-shape threaded Jack, jack with moving cross. Manufactured jacks of Tanha Poulad Co. are generally designed and produced in two types; heavy and light. Light Jacks are designed and produced from male pipe 5 with thickness of 2mm and female pipe 6 with thickness of 2mm. heavy jacks are designed and produced from male pipe 5 with thickness of 5/2mm and female pipe 6 with thickness of 2mm. Jacks can be produced and designed in different sizes according to customer orders.