Crystal clear suction cup with 4" low-profile, heavy gauge wire hanger provides ample room for a 5.5" CineSpinnerTM to rotate freely in your window! This will assure you the most enjoyable visual effect of the amazing, lifelike motion from your CineSpinner. Simply mount the suction Cup on a smooth, well lit surface (like a window); hang your CineSpinner using the clear filament line and let the natural movement of air create movement of the disk that animates the figure. No Batteries are required. CineSpinner with filament line sold separately. Clear Suction Cup Measures Approximately 1.75 Inches in Diameter. Wire Hanger Measures Approximately 4 inches From Suction Cup. Designed especially for CineSpinnerTM Animated SunCatchers. May be useful for mounting many other items.