PoolStyle WTB-1018 4' x 4' 16 Gauge Equalizer Pillow Solid Cover The unbound design provides a

The unbound design provides a secure fit over the entire pool area

Engineered for superior filtration efficiency

Whether you're replacing parts or performing a first-time installation

standard flanged inlet and outlet

The versatile design suits modern

PoolStyle WTB-1018 4' x 4' 16 Gauge Equalizer Pillow Solid Cover The unbound design provides aThe PoolStyle 4' x 4' equalizer pillow helps prevent water and debris from collecting in the center of your pool cover during winter. Made from 16 gauge durable vinyl, this heavy duty air pillow provides pressure relief when pool water freezes. By compressing as ice expands, it helps protect your pool walls and liner from potential damage. The pillow also makes it easier to drain off excess water, keeping your cover more manageable during the off