The aquarium floating plant ring is designed to provide a simple and easy-to-install solution for maintaining a clean environment for your fish. The rings are made of EVA material that is durable and easy to clean, ensuring that your fish tank stays clean. Can give you more convenience to use. Features -Color:Black -Material:EVA -Size:9.00X9.00X0.50cm/3.54X3.54X0.20in -Size:12.00X12.00X0.50cm/4.72X4.72X0.20in -Size:15.00X15.00X0.50cm/5.89X5.89X0.20in -Size:18.00X18.00X0.50cm/7.07X7.07X0.20in -Size:21.00X21.00X0.50cm/8.25X8.25X0.20in -Can be used with various types of aquatic floating plants, making it a versatile tool for maintaining plant. -This floating plants ring is made from plastic, very sturdy, longtime used in your daily life, give convenience. -Achieve a natural and elegant look with the simple color design of this floating plant ring for aquariums. -This floating plant ring effectively separates and protects feeding, ensuring fish can be feed conveniently. -Feeding your fished has never been easier with the convenient feeding feature of this floating plant ring. Package list: 4 x Aquarium Square Floating Plant Ring (9cm) 4 x Aquarium Square Floating Plant Ring (12cm) 4 x Aquarium Square Floating Plant Ring (15cm) 4 x Aquarium Square Floating Plant Ring (18cm) 4 x Aquarium Square Floating Plant Ring (21cm)