This is an 80mm extension adapter with a guide made of aluminum. (Total length 100mm) It is lightweight and durable. It is compatible with general 5mm diameter rod tips (Shimano, Daiwa, etc.). The thicker pipe is 30mm long, the thinner pipe is 60mm long, the overlapping part is 10mm, the total length is 80mm, and the weight is about 1.8g. Since it is handmade, there may be slight variations. ★ Even with the same 5mm diameter, there seems to be some difference in thickness depending on the manufacturer. If adjustment is necessary, please use aluminum foil, etc. (The holes are made slightly larger and the shafts slightly thinner to make adjustment easier) ◆ If you purchase multiple sets, we will discount the shipping cost, so please comment in advance. 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 about 2.6g. The inner diameter of the line guide is about 4mm, and the height is about 9mm. Since it is handmade, there may be slight variations. Even with the same 5mm diameter, there seems to be some difference in thickness depending on the manufacturer. If adjustment is necessary, please use aluminum foil, etc. (The holes are made slightly larger and the shafts slightly thinner to make adjustment easier) ◆ If you purchase multiple pieces, we will discount the shipping cost, so please comment in advance. Species...Smelt