This is a lightweight resin fixture for connecting two pipes at a right angle. It comes in a set of two. Model: FSFPCX012-12J For use with φ12mm outer diameter round pipes Includes 2 sets of hexagon socket head bolts/nuts M7 https://www.iwata-fa.jp/html/product/item_detail.php?id=559 I bought this because the resin joint of my pipe rack broke, but the pipe dimensions didn't match, and I was able to fix it another way, so I didn't use it. If you're okay with connecting three 12mm outer diameter pipes in a U-shape (set of 2), it's less than half the purchase price, so I hope you'll consider buying it.