The package contains: There are 3 shrimp filter protectors and 3 sponges. These air intake filter covers protect against small fish and shrimp being sucked into the filter and causing death. Material: Stainless steel, sponge. Please pay attention to the solder joints of the wires when washing your hands. The wire mesh may be deformed during transportation, you can pinch it yourself and gradually return it to its original shape. Easy to use: The shrimp filter cover is easy to use and can be directly inserted into the hard pipe of the water inlet to effectively prevent the inhalation of small shrimp and fish, and extend the use time of the filter material in the filter.