White Eagle Holographic Gold Rainbow 51-Inch Windsock by White Eagle. $10.18. Weather resistant holographic mylar fabric. Measures 4-inch by 51-inch. Sparkles in the sun. Swivel attached for hanging. Holographic Mylar windsocks dazzle in the sun. Butterflies and hummingbirds love the bright rainbows they reflect. They also work well as a deterrent to pesky birds. Mylar windsocks will flutter about in the slightest breeze.