Pool Mate Corner tubes are constructed of durable heavy-duty， puncture resistant vinyl. The corner tube has a conveniently placed， leak-proof valve that is easy to fill with a garden hose. Corner tubes will keep your pool cover in place all winter long. Water tubes should be filled half-way to prevent popping caused by expansion if the water freezes.
2 ft. x 2 ft. corner tubes
Heavy-duty vinyl construction
Easy fill valve
Fill halfway with water to allow for ice expansion
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