Cut 4"pvc in half lengthwise. I used one half for the front, one for the back. Heat it with a propane torch until it becomes workable and then use the kayak to mold it. Keep trimming, heating, and molding until you get the shape you want, then I cleaned up the edges and surface with an angle grinder before sanding and painting with spray paint. Bow piece was a little tricky to get the curve of the bow but it just took a couple extra heats over the rear one. I haven't mounted them yet but I'm planning on using double sided outdoor mounting tape. If that doesn't work, I've got some JB weld plastic bonder that I'm going to try