This is a 70mm extension adapter with a guide, made of aluminum. (Total length: 90mm) It is lightweight and durable. It supports a base diameter of 5mm for the tip. The thicker pipe is 30mm long, the thinner pipe is 70mm long, the overlapping part is 10mm, the total length is 90mm, and the weight is approximately 2.2g. The inner diameter of the line guide is approximately 4mm, and the height is approximately 7.5mm. Since it is handmade, there may be slight variations. ★ Even with the same base diameter of 5mm, there may be slight differences in thickness depending on the manufacturer. If adjustment is necessary, please use aluminum foil, etc. (The holes are made slightly wider and the shaft slightly thinner to make adjustments easier) ◆ If you purchase multiple sets, we will discount the shipping cost, so please comment in advance.