MagNaturals are locked against terrarium glass with Mega Magnetic Power! Comes standard with EXTRA STRONG magnets. Granite Colored Large Worm Feeder Ledge. Large Magnetic Powered Worm Feeder Ledge. Great for all small to medium reptile, amphibian and invertebrates who feed on super worms and large meal worms. The specially designed worm cup has a “lip” around the top that prevents the worms from escaping. The cup is removable and can be cleaned or replaced. Size 13″ x 8″ Ledge 5″ cup. Size 13″ x 8″ Key Features Install or relocate in seconds.NO glue or velcro.100% non-toxic materials.Magnetic force guaranteed for life.Easy to clean.Maximize terrarium space.Create exciting terrariums with multiple units… then recreate them at will! 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 as well as creating more natural and beautiful environments for you to enjoy.