Mine were white, and came from Home Depot. My neighbor and I bought some at the same time. I had leftovers when we were putting this thing together, and they were the ones I used. She used hers right away on her chicken coop, and I am not kidding, three years later, and not one of them had broken. It's in sun most of the day too. The zip ties were to attach some shade cloth and a tarp.
