MagNaturals are locked against terrarium glass with Mega Magnetic Power!Medium Magnetic Powered Rock Ledge. Perfect for all reptiles, amphibians and invertebrates up to 1 pound! Take advantage of the vertical terrarium climbing space as well as giving your terrarium pet a natural outlet for their climbing behavior. MagNaturals Rock Ledges will create a beautiful, natural and beneficial addition to your pets environment.Size 11" x 5"Not only are MagNaturals original and innovative, they are also made in the U.S.A. We are dedicated to developing new products that will enhance the lives of terrarium pets ad well as creating more natural and beautiful environments for you to enjoy.