EQUALIZER 4x15 PREMIUM

4' x 15' PREMIUM 27 Gauge Ice Equalizer Pillows relieve the stress from the walls of your pool caused by ice. They also reduce the build-up for rain water and snow on your winter cover. Simply inflate the pillow, place it under your cover, and secure it using the provided grommets during the winter months. 42mm thick 27 guage vinyl. Double Seams to prevent delfaltion. Easier to use Boston Valve. Includes 4 reinforced grommets and 50ft rope. Should be filled 1/2 to 3/4 of the way with air so there is room forexpansion when the pool water freezes.