T304 non-resonant stainless steel suction head is 9.00 inches long with 5.00 inches × 3.50 inches, and Silverstone double-wall T304 non-resonant stainless steel with angel edge outlet is 2.25 inches long with 5.25 inches × 3.25 inches outlet. Due to the different shapes and designs of stainless steel tail throats, the price difference is also large. Some products are just simple exhaust pipes without complicated patterns and designs inside, so this style will be cheaper. Some products have complicated internal structures. From the back, there are various patterns and shapes, which are very beautiful and expensive.