Breathable & Water Permeable: The high ventilation mesh allows smooth rainwater flows while stagnant water and odors, maintaining fresher water longer Generic Compatibility: Available in 30cm to 100cm diameters, these mesh covers fit most household rain barrels, water storage tanks, and collection containers for versatile protections Effective Filtration: The fine polyester mesh design effectively blocks leaves,, and debris from entering your water barrels while Culicid breeding, ensuring clean rainwater with minimal maintenance Secure Installation: Adjustable drawstring edges provide a tight and stable fit on barrels openings, wind and rain without slipping or shifting for worry release use & sturdy: Lightweight yet sturdy, these washable covers are, remove, and clean, offering long term cost effective protections for outdoor water storage, Manufacturer: Msioytog