Zip-Change Letter Changer. 18' ft zip changer. Telescopic letter changer with Regular 3 &frac34;" suction cup Superior suction - heavy duty suction cup firmly holds each letter for positive control. Easy release - release wire breaks the cup suction when pole is twisted clockwise. Adjustable Elbow - can easily be se to any angle. Lightweight and strong - Heavy Duty aliminum pole provides easy use. Recommended letter size: 6" 8" 10" 12"