10 Gallon Dual Polar White. Propane Tank Cover Helps protect your tank from the elements Zipper access to valves Protect propane bottles while in storage with this deluxe heavy-duty vinyl cover. Molded nylon zipper combined with a pressed wood top creates a more rugged and weatherproof cover (wood top not available on single model nor is it required to hold shape). Hollow bead welt cord and elastic shock cord provide a longer life and a neat tailored fit.