Because the hole size is small, compression ratio is relatively high, the overall feed yield is low. Our company has adopted some special production processes, greatly increase the opening hole percentage of the ring die. In addition, we can customize the ring die according to the customer provided formula and production process, which make the output of shrimp material has been greatly improved. For example, aperture 1.0, compression ratio 28-30 ,IDAH 530 ring die can reach 3.5-4t/h