The Dunk Tank is for all ages and holds 300 Gallons of water. Seat holds up to 220 lbs in weight! This rental does include 3 softballs for use. Dunk Tanks are the perfect rental item for any summer event! Dunk friends, family, your boss, colleagues & more! This item is popular for school events, company picnics, church carnivals & backyard parties such as graduations! The customer will need to provide a water source and hose on site to fill the Dunk Tank. If you do not have a water source on site, call us for recommendations of how to fill it. We are not able to supply water sources at this time.