This is a 90mm extension adapter with an aluminum guide. (Total length 115mm) It is lightweight and durable. It is compatible with standard 5mm base diameter fishing rod tips (Shimano, Daiwa, etc.). The thicker pipe is 35mm long, the thinner pipe is 90mm long, the overlapping part is 10mm, the total length is 115mm, and the weight is about 2.9g. The inner diameter of the line guide is about 4mm, and the height is about 12mm. Since it is handmade, there may be slight variations. ★ Even with the same 5mm base diameter, there seems to be some variation in thickness depending on the manufacturer. If adjustment is necessary, please use aluminum foil, etc. (The holes are 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