This is an 80mm extension adapter with an aluminum guide. (Total length 100mm) It is lightweight and durable. It is compatible with standard 5mm base diameter fishing rod tips (Shimano, Daiwa, etc.). The thicker pipe is 30mm long, the thinner pipe is 80mm long, the overlapping part is 10mm, the total length is 100mm, and the weight is approximately 2.6g. The inner diameter of the line guide is approximately 4mm, and the height is approximately 9mm. Since it is handmade, there may be slight variations. ★ Even with the same 5mm base diameter, there may be slight differences in thickness depending on the manufacturer. If adjustment is necessary, please use aluminum foil, etc. (The hole is made slightly wider and the shaft is made slightly thinner for easy adjustment) ◆ If you purchase multiple aluminum guide adapters, we will discount 200 yen from the second one, so please comment in advance. Type of fish...Smelt