The Turnball is a stable, durable speed-ball set. Its sturdy construction can withstand powerful shots from adults and teens alike. Structure materials: base 100.0% Polyethylene, pole: 100.0% Steel, racket: 69.7% Polypropylene, 30.3% Thermo polymer elastomeric. The base can be weighted with water or sand. Easy assembling/dismantling. Steel pole and plastic base fastening system for superb durability. 2024