K9 self-propelled artillery has been exported to account for half of the world's self-propelled artillery market. We have developed and are supplying hydraulic oil filters for K9 self-propelled artillery. We have all the performance testing equipment for the hydraulic oil filter of the K9 self-propelled howitzer and verify the quality of the product every year. It has low pressure loss, high filtration efficiency, and durability that does not break even under the pressure of 10.5kgf/㎠.