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Ideal for beginning players 8 and under playing on a 36' indoor tennis court, this lightweight foam ball has an oversized diameter for simple learning. Made of high-density lightweight foam for a modified bounce, the QST 36 Foam is perfect for indoor court settings. All Penn QST products are USTA and ITF approved and endorsed by the USPTA.
Penn is one of the most recognized names in tennis balls. Penn was started in Jeanette, Pennsylvania in 1910. Since then they have developed some of the most important tennis ball enhancements. Penn was the first to invent pressurized ball cans. Next they invented the first fluorescent yellow tennis balls. In 1973, the USPTA used Pro Penn tennis balls as their official ball. Throughout the past 100 years Penn has made revolutionary discoveries that have continually improved the tennis ball.