Cast iron straight edge is used to test the straightness and flatness of workpiece and equipment installing.
Straight edges are also used for blue matching during hand scrapping operations&have wide and parallel working surface for application of spirit level.
According to standard JB/T7977-99
Working surface made by scraping or grinding.
Working environment temperature is (20±5)°C
If you want other size of cast iron straight edge ,we can produce the edges according to your drawing.