Roof rack is mild steel tube 1.5" x .095. Wind valence is from Boat Outfitters | Marine Hardware, Boating Accessories, Tackle Centers - https://www.boatoutfitters.com/?srsltid=AfmBOoqLneaEuurBUZTEYk3WLNOmoRi1KlYMzLNm-JByOQk7W25LnSug. 1/4" HDPE . Cut to fit. I used a jig saw to cut out the curvature.