Okay, these water-filled pool balls are seriously the coolest thing for summer fun! You get 2 balls in black and green, each measuring 6.5 inches - the perfect size for gripping and playing underwater. Made from tear-resistant PVC material, these things can handle some serious action without popping or cracking. The magic happens when you fill them with water using the included hose adapter - they have this awesome neutral buoyancy where they sink first then slowly float to the surface, making them perfect for underwater games. Imagine playing basketball, football, or rugby... but underwater! You can dribble, kick, bounce, pass, and intercept these balls up to 10 feet deep. The hose adapter comes with two sizes to fit standard 5/8 inch and 1/2 inch water pipes, so filling them is super easy. Perfect for pool parties, beach days, summer gatherings, or even physical education classes. They're recommended for ages 12 and up, and honestly, adults have just as much fun with these as teens do. Combine them with other pool toys to create obstacle courses or team challenges. Seriously, if you're looking to level up your pool game this summer, these water balls will provide hours of entertainment and create some amazing memories with friends and family!