The aluminum pieces I need are european dimensions, 40mm OD 34.8mm ID. Larger than 1 1/5" which is common. One piece was free, found a manufacturer of tubing that sent me a scrap ( 9'), they even anodized it for me. I told them that the ID was critical and they sent me a piece with OD close to my ID spec, whatever. The other piece came from online metals, they guarantee OD specs but not ID, this piece is approx 2 thousandths too small and not anodized. I could sand the inserts or hone the tube but that would create a weaker joint. The fiberglass pole I have has nothing on it, it is very light so some carbon is likely. It tapers to the tip and is wound by looking at the glass lines. I assume it would work fine but not sure. Don't want to deal with another broken pole in the surf, very risky at best!