The Big Blue Base is more versatile than the typical net game base! Use to create volleyball, netball, badminton, and more! The durable PVC base can be filled with water, sand, or pea gravel in its large fill hole. Its tip-n-roll wheel feature with durable wheels provides easy transport. Easily insert a tall or short post, then use a single bolt to lock in place to prevent unwanted spinning. When filled, base weighs 60 lbs. if with water (80 lbs. if with sand). Choose Tall Post or Short Post. Tall Post height adjusts from 61"-96", has a push-pin locking system, and features pre-marked holes for men's volleyball, women's volleyball, junior volleyball, and badminton official heights. Short Post height adjusts from 41"-66" and is great for anything from tennis height up to official badminton height. Start with a Big Blue Base and add components or purchase a Big Blue Base pack and save! Big Blue Base Paddle Tennis Pack includes: 1 Tall Post 1 Big Blue Base 1 Paddle Tennis Attachment with Ball and 2 Paddles Big Blue Base Net Pack includes: 2 Big Blue Bases, 2 Tall Posts, and a net