HEAVY DUTY POLYESTER WHIRLY BIRD COVER, grey. Covers 14" turbine with interior bracing and 12" turbine with exterior bracing. Keeps heated air in during the winter months. Helps to prevent rust and corrosion on turbine parts. Prolongs equipment life. Water repellant and mildew resistant Rugged brass grommets for securing split cover. Heavy duty sun-resistant cord. Each cover individually poly bagged with cover size in bold 1" high numbers and references cooler models.