Robelle 2 ft. Corner 4-Pack Heavy Duty Blue Pool Cover Weights, .33 MM Thick Vinyl, Pool Water Bags, Water Tubes

• 4-Pack Heavy Duty 2 ft. Corner Pool Cover Weights for Winter Pool Closing
• Heavy Duty .33 MM Thick Vinyl constructed 107% heavier than industry standard.
• Since 1973 Robelle has been making the best products to close your pool. Use the best pool closing products designed with over 50 years of experience.
• Prevents Winter Pool Cover From Falling Into Pool.
• Single Chamber Design For Easy Filling.
• Fill Halfway With Water to Allow For Ice Expansion.
• If you have trouble closing the valve please use a hair dryer to loosen before closing.

Product Description Robelle 2'x2' 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. 4 pack. Safety Warning Always ensure the valve is properly loosened before closing the pool cover. If the valve is stuck, use a hair dryer to gently warm and loosen it before attempting to close the cover.