(2 Pack) Zoo Med Screen Covers for 10 Gallon Tanks. Zoo Med's Screen Covers feature one piece plastic frame construction that clips on tight to prevent loss of valuable pets. Some models have access doors for easy routine maintenance (i.e. feeding crickets, etc.) No rust galvanized steel wire, double sealed for safety. Exclusive NEW Clamp Lamp Bracket allows you to secure a clamp lamp to the top of your screen!