In the Breeze #9155 — Iridescent Mylar Spin Quartet with Crystal; made with flexible, MESMERIZING iridescent, reflective Mylar in flowing interconnecting curls Measuring 17 inches wide and 32 inches high and featuring interconnect heat-cut Mylar strips. The inner, cut plastic crystal hangs from a 4-inch chain Designed to spin, dance and sparkle in the slightest breeze but also tough enough to withstand varied weather conditions Ships flat with no assembly required. They are ready to hang with the attached heavy-duty ball-bearing snap swivel Reflective Mylar is often used as bird repellant and scaring nuisance animals. They are also great to see wind direction. Butterflies and hummingbirds love the bright rainbows they reflect