This is for the end of 1/4" ID Loc-Line Any-Which-Way Coolant Hose. It makes for a great clamp mount for GoPro cameras.Print the mount, use epoxy (like J-B weld or Kwik) scuff up the end of the loc-line that will be epoxied to allow the epoxy to get a good grip. I choose Bessy 4" clamp from local Lowe's. A #10 bolt with fillips head will fit inside one of the loc-line elements perfectly and can be used to bolt it to pretty much anything. The Loc0Line was purchased from McMaster Carr for around $7.00 for a 1' length, I only used half of it as the weight of the camera is enough to make the full foot long piece droop on it's own but the 6" piece is nice and stable no matter the angle it's placed at.