Its specifications are expressed in millimeters of side width × side width × side thickness. For example, “∠25×25×3″ means an equilateral stainless steel angle with a side width of 25 mm and a side thickness of 3 mm. It can also be expressed by model number, which is the number of centimeters of side width, such as ∠3#. The model number does not indicate the size of different side thicknesses in the same model. Therefore, fill in the side width and side thickness dimensions of the stainless steel angle steel in the contract and other documents, and avoid using the model number alone. The specification of hot-rolled equilateral stainless steel angle steel is 2#-20#.