I bought this Kei Truck to build a flower truck out of. Racks for this truck are super expensive so I figured id try to build it out of electrical pipe and maker pipes fittings. Turned out perfect. I used 4 flange connectors to attach to truck bed, 2 U bolts to secure to existing headache rack, 4 90 degree connectors to make the top square, and a bunch of T connectors. I then connected my cedar boards to the pipe. can withstand highway speeds so far. I used a hinge from amazon to get the 3 sides to swing up.