Product Information Material:PVC 2 in 1 swimming ring: slide the whale buoy and sandbags into the ring, and the swimming rings can be suspended on the water through the ring. 2. Gently remove the whale buoy, only the ring of sandbags stands up at the bottom of the pool. Tip: Pour the water into the thin tube before use to help it float; please ensure that the sandbag is fully contact with water, which will help environmental protection in a good state at the bottom of the swimming pool. Folding and reusable use: The pool ring can be folded and can be reused. It is recommended to dry the diving ring, foam whale buoy and sand bags in the sun. Use scenario: Suitable for children and adults to play, swimming pool parties and underwater disorders training, diving, underwater swimming, summer birthday gifts. Enjoy your summer by diving swimming ring. Package included: 17PCS Diving Ring Set 3 * buoy+3 * diving rings+3 * sandbags+2 * torpedo +2 * seagrass+2 * fish rings+2 * Jellyfish Note Please allow 2-3 cm difference due to manual measurement. Besides different computers display colors differently, the color of the actual item may vary slightly from the below images, thanks for your understanding(1 inch = 2.54 cm)