Perfecto Canopies are the economical; yet stylish way to top off your aquarium and prevent water splash. Keeps your fish in and other pets out! With a polypropylene hinge for easy access to your tank; as well as a plastic back strip that can be cut for heaters; filters; etc.; these canopies provide protection for your fish while allowing you to customize your lighting setup. Long-lasting performance; made to fit all Perfecto Aquariums. Glass top is designed for use with 40 gallon breeder Perfecto aquariums. Not guaranteed to fit other brands of aquariums. Please check dimensions to determine compatibility with your aquarium. The 36 in. x 18 in. Marineland Perfecto Glass canopy measures 34.75 in. x 16.75 in. Visit our Pet Blogs for fun information and articles about all of your favorite pets!