Backboard: Dimensions: 28x18". Maxium Applicable Ball Model: 7#. This hoop has the look, functionality and durability of a professional-grade basketball system.Trustworthy. Adjustable Heights: The basketball hoop set has heights from 2.9 to 3.9 feet that can be adjusted to meet the needs of different ages and heights. Stable Base: Dimensions: 35.5 x 24 x 6". The base can be weighted down with sand or water to increase stability and is less prone to dumping and shaking. Base Fills with: 60 lbs water or 75 lbs sand. Swimming pool Use: It is the best gift for children and helps to increase parent-child interaction or have fun with your friends.This high quality sports equipment that will last you for years of use and can grow with your player. Premiu.