One air release tool for fishing. Compared to commercially available products, the cost performance is significantly better. ◎ Comes with a string to prevent loss. ◎ Includes a stainless steel rod for cleaning the needle hole. Without this, it clogs quickly. Blowing air into it doesn't easily clear the blockage. ◎ Needle length: approximately 30mm, needle tip inner diameter: 0.9mm, needle tip outer diameter: 1.2mm. (Air won't escape with a thinner needle. A thicker needle will damage small fish. This is the optimal thickness for small fish.) ★ Releasing small filefish and female filefish during spawning season after air release is common, as they cannot dive on their own without it and become food for kites. Small scorpionfish are similar. ★ On boats with circulating seawater tanks, fish that have had air released swim normally and vigorously until the end of the trip. Watching filefish swimming energetically is enjoyable. If you keep them alive for a long time, you'll grow fond of them, and you'll often release them at the end of the trip ^_^. ◎ See the photos for how to use the air release tool. Insert it about 5mm, and the air will hiss out. It's easier to release the air by gently pressing on the inflated part of the swim bladder while inserting the needle. Be careful not to press too hard, or the internal organs will come out of the anus. Release about half the air; apparently, it's not good to release all of it. Air is said to re-accumulate in the swim bladder of released fish. ★ 【Caution】 Sharpen the needle tip with a file or similar tool from time to time. If the needle tip becomes dull, it won't penetrate the soft, elastic swim bladder even if it pierces the skin. #FishingTackle #AirRelease #AirRemoval #Needle #SwimBladderAirRelease #SwimBladderAirRemoval