The Tachikara STBR Top-Grade Rubber Tetherball is crafted from durable top-grade rubber in vibrant yellow. With a butyl bladder and yarn-wound construction, this official size and weight ball is the ideal choice. It includes a nylon rope with metal clip that has been attached to a durable recessed metal post. Bright and long-lasting, this yellow tetherball is recommended for all ages. Established in 1915 and incorporated five years later, Tachikara is a world leader in advanced, innovative design and manufacturing of athletic balls. The company revolutionized the sporting goods industry in 1952 with technology capable of producing seamless balls, and again in the years that followed with its patented Loose Bladder Construction method, which allows a layer of air to circulate between the inside bladder and outside cover. The resulting precision-balanced ball, first introduced in competition at the 1964 Olympic Games in Tokyo, affords truer flight and a superior soft touch. In 2003, Tachikara proudly introduced another pair of innovations. The Dual Bladder Construction offers greater durability and improved control and flight, and Sensi-Tec materials improve upon their predecessors. Named for the god of power in Japanese mythology, Tachikara is committed to cutting-edge design, manufacture, and materials. Tachikara offers avid players innovative and premium-quality products at excellent value. * Top-grade rubber-covered tetherball in yellow * 25.2-inch circumference * Weighs 14 to 15.8 oz. * Features Butyl bladder * Durable yarn-wound construction * Includes nylon rope with metal clip