This Aquarium Plant Holder is 3D Printed using aquarium-safe PLA Filament. This super simple design is such a helpful little thing, simply put your stemmed plant clipping into one of the openings, slide it over the rim of your aquarium, and make sure the roots are touching the water and that's it! Whether you're using Pothos, Philodendrons, Swiss Cheese plants, Bacopa, or any other aquarium-safe thin-stemmed plant, your fish will be super happy with the results. Your plants will help in the removal of dangerous nitrates that occur naturally in your aquarium from your fish's waste.Measurements:★Fish Tank Size Accommodation: 10-gallon RIMMED Tanks★Top to Bottom: 2.84" (72.1mm) Width: 0.75" (19.2mm)★Top Hole Opening: 0.44" (11.3mm)★Bottom Hole Opening: 0.35" (9.0mm)★Rim opening: 0.56" (14.4mm)★Number of Openings where your roots and stems will be able to go through for ease: 8!