To build this rod holder, you’ll need a ten-foot piece of 2-inch diameter schedule 40 PVC pipe that will serve as the outer shell, though you can easily make a longer version for switch, spey, or Euro nymphing rods by adding another piece of pipe using a coupler. Foam pipe insulation serves to protect the rod, but isn’t totally necessary. You will have to omit it if you’re building a holder for heavier weight rods, as the larger guides won’t fit in the one-inch hole in the center of the insulation. I used three-inch U-bolts to secure the rod holder to the vehicle’s roof.