The BH Home & Linen Heavy Duty Dolphin Aquarium Round Toilet Seats are perfect for any aquarium. These seats are made of high-quality resin and are designed to be durable and stable. The seats come with metal hinges and bumpers for better durability and stability. The seats also have an acrylic cover that is crystal clear with color-coordinated bumpers. The BH Home & Linen Heavy Duty Dolphin Aquarium Round Toilet Seats are a great way to add style and comfort to your aquarium.