This is a guided 90mm extension adapter (total length 115mm). It is lightweight and durable. It supports a base diameter of 5mm for the tip. 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 2.7g. The inner diameter of the line guide is about 4mm, and the height is 7-8mm. Since it is handmade, there may be slight variations. Even with the same base diameter of 5mm, there seem to be slight differences in thickness depending on the manufacturer. If adjustment is necessary, please use aluminum foil or similar. ◆ If you purchase multiple sets, we will discount the shipping cost, so please comment in advance.