Permeable hole design: there are permeable holes and at the bottom of each aquatic plant cup, which is good for water circulation and oxygen absorption, which can help aquatic plants have good photosynthesis and also good for healthy fish growth. Sturdy suction cups: Aquarium aquarium plant holders come with powerful suction cups, you can fix them where you want them to be, making them easy to move and hang firmly on the tank. Please clean the glass before use to make sure the suction cups are firm. Package Content: 32 pieces in total, with 2 styles, including 12 flat styles and 20 Round styles, the round are larger and the oval are smaller. Each piece is properly sized to fit the fish tank well, and the 2 different styles make them more practical. Material: water plant basin made of transparent acrylic material, safe and reliable, smooth ; transparent design, more convenient for viewing, and fish tank into one; compared to glass products are more solid, can decorate your fish tank for a long time. Application: Hanging fish tank are suitable for aquatic plants in freshwater or saltwater fish tanks; they also provide an Perfect hiding place for fish or reptiles to help them feed, while also adding visual effects for human viewing.