The commonly used shapes of refractory bricks include straight bricks, side thick wedge-shaped bricks, vertical thick wedge-shaped bricks, vertical wide wedge-shaped bricks, and arch foot bricks. The first letter T in Pinyin usually represents the general brick number, followed by a short horizontal line as the sequence number. The general brick numbers range from T-1, T-2, T-3, T-4, T-5... T-138, etc. Different brick numbers represent refractory bricks of different shapes and sizes. The specification representation method is: the specification of straight bricks is represented by b * a * c; The specification of wedge-shaped bricks is represented by b * (a large * a small) * c; What are the sizes of refractory bricks that we usually see when the specifications of arch foot bricks are expressed in L * a * c. In refractory bricks, we often use T-3 to represent the size of standard refractory bricks, also known as standard bricks. Its size is generally 230 * 114 * 65mm, and the rest also have differences in size according to different grades. Here, I will show you in the form of pictures.