Mesh filter that shuts out insects entering from the air conditioner drain hose (drain hose) and includes cockroaches, doats, and reptiles. It is often infiltrated from an air conditioner hose. The special filter has a large mesh mesh filter is effective for small insects. The fine dust and debris will not accumulate inside the hose. It also reduces wind intrusion, reduces noise from indoors. It absorbs dust and other air conditioners that come out with drainage, so it is easy to use around the outdoor unit. Compatible with 0.7 inch (18 mm)