Thank you very much for viewing. This is an eel trapping device. Due to its popularity, I couldn't keep up with production and had to stop selling it. If I can't keep up again, I will stop selling it, so please understand. Thank you for the many repeat purchases. I've included screenshots of happy posts in the product photos. They give me a lot of energy when I'm making them. Thank you. Due to rising material costs, the price will increase as soon as I run out of materials. Please understand. There are entrances on both sides, allowing eels to enter from either side. Place the bait in the middle. There is a gap of about 5 cm under the bait box to allow eels to pass through. Wood shavings etc. may be attached to the acrylic board. Please understand. There is no problem with use. I also use the single-entry type, but I use this type every year. It is especially effective in stagnant rivers. The two-entry type has a much better eel capture rate and number of eels caught per catch than the single-entry type. Last year, I caught 28 eels with this device. 8 of them were over 1 kg. I also use single hooks, but this device allows me to set up the trap at any time without being bothered by bait thieves, so I use both. There are some wood cracks, but there is no problem. I have experience as a carpenter, but this is a handmade product, so please understand. It uses cedar wood. The size is 11cm x 11cm for 4 boxes. The length of the tubes inside is approximately 100cm each. The bait room is partitioned, so the bait will not run out even if eels enter. The smell of the bait continues to linger, so several eels will enter when conditions are favorable. Once they pass through the entrance, they cannot escape. Please store it in a place away from direct sunlight when not in use. I put my heart into it, and it takes time and effort to make the two-sided device. It's a rare design, and the material costs and shipping costs are quite high, so this is the price. I want you to experience the excitement of catching eels. It will be packaged in cardboard and shipped. Tube, turnover, box